12 Things to Know Before Going on a Cruise

You booked the cruise. Now the important part is making sure you actually get on the ship — with the right documents, the right things in your carry-on, and no expensive surprises waiting at sea.

This guide is for the period after booking and before departure. If you are still choosing a cruise, start with Things to Know Before Booking a Cruise instead.

Affiliate disclosure: As an Amazon Associate, KnowThisBefore earns from qualifying purchases. We may also earn a commission from other affiliate links in this article, at no additional cost to you.

What Do You Need to Go on a Cruise?

For most travelers, the essentials fall into a few categories:

• The correct travel documents for your itinerary: Passport, citizenship documents, photo ID, visas, or other documents as required for your specific cruise.
• Cruise boarding documents: Complete online check-in and save your boarding pass or eDocs before leaving home.
• A first-day carry-on: Keep medications, valuables, travel documents, and anything you may need before your checked luggage reaches your cabin.
• Cruise-line-compliant luggage: Check your cruise line’s current rules for prohibited electrical items, beverages, and other restricted items.
• A phone and connectivity plan: Know how you will avoid unintended maritime roaming charges and whether you need ship Wi-Fi.
• A health plan: Bring necessary medications, prepare for motion sickness if needed, and understand your medical coverage away from home.

The exact requirements depend on your citizenship, itinerary, destinations, and cruise line, so verify those details before relying on a generic cruise packing list.

1. Do Not Assume a Birth Certificate Is Enough for Your Cruise

One of the easiest ways to ruin a cruise is to arrive at the terminal with the wrong travel documents.

U.S. citizens on certain closed-loop cruises — cruises that leave from and return to the same U.S. port within the Western Hemisphere — may be able to cruise without a passport book. U.S. Customs and Border Protection says qualifying travelers can use other citizenship documentation, such as a government-issued birth certificate, together with government-issued photo identification when applicable.

But that does not mean every cruise from the United States can be taken without a passport.

Your itinerary, destination countries, citizenship or immigration status, and cruise line requirements can change what you need. A cruise company may also require a passport even where government rules would otherwise permit another document.

The U.S. Department of State strongly recommends traveling with a valid passport book even when it is not required. The reason becomes important if something goes wrong: a passport card or birth certificate that works for a cruise may not be sufficient if you are stranded abroad and need to fly back to the United States.

Before leaving home:

• Verify requirements with your cruise line.
• Check entry and visa requirements for every country on the itinerary.
• Confirm that the name on the reservation matches your travel documents.
• Check passport validity requirements for your destinations.
• Make copies or secure electronic copies of important travel documents.

Do this well before departure, not while packing the night before.

2. Online Check-In Windows and Deadlines Vary by Cruise Line

Cruise check-in is not like showing up at a hotel whenever you want.

Most major cruise lines have an online process that collects identification, travel-document information, payment details, and sometimes a port arrival time. The timing differs significantly by company.

For example, Royal Caribbean says app check-in can begin 45 days before sailing. Carnival says online check-in and arrival appointment selection are available within 14 days before sailing, with online check-in due no later than midnight Eastern Time before the sailing date. Norwegian says its online check-in steps become available 21 days before sailing and that the opportunity to check in online ends 3 days before sailing.

These policies can change, and your sailing may have specific instructions.

After check-in, save the boarding pass or eDocs somewhere accessible. Do not rely solely on having cellular service at the terminal.

3. Your Terminal Arrival Time Is Not the Same as the Ship’s Departure Time

A ship scheduled to sail at 4:00 p.m. does not mean you can walk into the terminal at 3:55 p.m.

Cruise lines have check-in and final-boarding deadlines. Carnival, for example, tells passengers to arrive within their selected Arrival Appointment and says passengers must be onboard by the Final Boarding time printed on the boarding pass or they will not be permitted to sail. Royal Caribbean likewise warns that guests arriving after its required check-in deadline may not be permitted to sail.

Your boarding pass and cruise-line communications are the authority for your sailing.

Also think about how you are getting to the departure city. A delayed flight on embarkation day can become much more serious than a delayed flight before an ordinary hotel vacation because the ship will not simply wait for you.

If you are flying to the cruise port, consider whether arriving the day before gives you a safer buffer against airline, weather, traffic, and baggage disruptions.

4. Download the Cruise App and Boarding Documents Before You Leave Home

Cruise apps are increasingly part of the trip rather than an optional extra.

Depending on the cruise line and ship, the app may be used for check-in, boarding information, schedules, dining or activity reservations, onboard messaging, account information, and other ship functions.

Royal Caribbean, for example, allows passengers to complete check-in in its app and says its app can be used onboard through the ship’s guest Wi-Fi without buying an internet package. Norwegian similarly directs passengers to its app for pre-cruise planning and online check-in.

Before traveling:

• Download the cruise line’s official app.
• Sign in and make sure the reservation appears.
• Complete required check-in steps.
• Download your boarding pass or eDocs.
• Save screenshots or offline copies of essential information.
• Download luggage tags if your cruise line provides printable tags.
• Check whether reservations you care about can be made before sailing.

Do not wait until you are standing in a crowded terminal with unreliable connectivity to do all of this.

The Royal Caribbean app can show ship time, port information, schedules, and other sailing details. Features and screens can vary by ship and sailing.

5. Pack a First-Day Carry-On — Your Checked Bag May Arrive Later

At the cruise terminal, larger bags are commonly handed to porters and delivered to your stateroom later.

That creates a simple problem: the ship may be open to you before your suitcase is.

Royal Caribbean specifically recommends packing a small first-day carry-on with travel documents, medications, a change of clothes, swimwear, and other items you may want before checked luggage arrives. Carnival tells passengers to personally carry boarding documents, valuables, medications, and anything requiring special handling or immediate access.

A sensible embarkation-day bag can include:

• Passport and other required travel documents
• Boarding pass
• Wallet and payment cards
• Prescription medications
• Phone and charging cable
• Essential medical items
• Swimsuit or change of clothes
• Sunscreen
• Glasses or contacts
• Basic toiletries
• Anything valuable or difficult to replace

The same idea applies at the end of the cruise. On some ships, checked luggage is collected the night before disembarkation, so you may need an overnight bag for pajamas, toiletries, medication, and next-day clothing.

6. Check the Prohibited-Items List Before Packing Your Power Strip

Cruise security rules are not identical to airline or hotel rules.

Items that seem harmless at home may be restricted onboard because of fire and safety concerns. The exact list varies by cruise line.

Royal Caribbean’s current prohibited-items policy, for example, prohibits electrical extension cords, power strips, multi-plug outlets, irons, and garment steamers, subject to specifically stated exceptions. Carnival’s current policy differs: it lists certain power strips, multi-outlet adapters, and extension cords without surge protection among items that may be permitted but may be removed if deemed unsafe.

That difference is exactly why generic packing lists can get travelers into trouble.

Other restricted categories can include weapons, heating appliances, certain recreational equipment, illegal drugs, and other items determined unsafe by the cruise line.

If you need to charge several USB devices, a compact USB multi-port wall charger can reduce the number of separate chargers you pack. Do not assume this or any electrical accessory is permitted onboard: compare the product specifications with your cruise line’s current prohibited-items and electrical-device rules before packing it.

Review the official policy again shortly before sailing because rules can change.

7. Alcohol, Soda, Water, and Coolers Have Cruise-Line-Specific Rules

Another packing-list trap is assuming that beverage rules are universal.

They are not.

Royal Caribbean currently permits each guest of legal drinking age to bring one sealed 750 ml bottle of wine or champagne on embarkation day, while other alcohol is generally prohibited except as its policy allows.

Carnival has different rules. Its policy permits a limited quantity of certain nonalcoholic beverages in cans or cartons in carry-on baggage and restricts bottled beverages. Princess has its own limits and corkage rules.

The important lesson is not to memorize another cruise line’s allowance.

Before buying drinks to take onboard, verify:

• Who is allowed to bring alcohol
• Type and size of permitted alcohol
• Whether it must be in carry-on luggage
• Nonalcoholic beverage quantity and container rules
• Cooler-size restrictions
• Corkage charges, if applicable
• What happens to alcohol purchased in port

A bottle that was permitted on your friend’s cruise may be confiscated on yours.

8. Keep Prescription Medication in Your Carry-On — and Check Foreign Laws

Do not put essential medication in a suitcase that disappears with a porter.

Royal Caribbean recommends carrying medication in hand luggage, in original labeled prescription containers, and bringing extra medication in case the itinerary is unexpectedly extended. Princess and Carnival similarly recommend bringing enough for the trip plus extra for delays and carrying medication in hand luggage.

There is another issue many travelers overlook: a prescription that is legal in the United States may be restricted or illegal in another country.

The State Department advises travelers to check the rules for every destination, particularly for controlled medications. Depending on the country and drug, the original prescription bottle alone may not be sufficient documentation.

Before departure:

• Bring enough medication for the entire trip plus a reasonable delay.
• Keep essential medication in your carry-on.
• Keep prescription medication in its original labeled packaging.
• Carry copies of prescriptions.
• Check the medication laws of each destination.
• Ask about storage or refrigeration arrangements for temperature-sensitive medication.
• Do not assume the ship’s medical center can replace your exact medication.

9. Prepare for Seasickness Before You Feel Sick

You do not need to assume you will get seasick, but if you are prone to motion sickness, preparation is easier before the ship moves.

CDC guidance says motion-sickness medication works best when taken before exposure, rather than after symptoms begin. Once motion sickness develops, stomach changes can also interfere with absorption of oral medication.

Options vary and can have side effects or interact with other medications, so people with medical conditions, those taking other drugs, pregnant travelers, older adults, and anyone unsure about an appropriate option should talk with a healthcare professional or pharmacist.

Also pack basic health supplies you know you use rather than assuming every familiar over-the-counter product will be readily available onboard.

10. Put Your Phone in Airplane Mode Unless You Intend to Use Maritime Roaming

One of the least obvious cruise costs can be sitting in your pocket.

When a ship reaches international waters, your phone may connect automatically to a maritime cellular network. That is not the same thing as ordinary domestic cellular coverage or the ship’s Wi-Fi.

Carnival warns that a phone left on can generate charges through incoming calls, voicemail, texts, or background app data and recommends airplane mode for passengers who want to avoid maritime cellular charges. Norwegian likewise says Cellular at Sea can connect automatically once the ship is in international waters.

Before sailing, decide how you will stay connected:

1. Check whether your mobile carrier offers cruise-specific roaming and what it costs.
2. Decide whether you need cruise Wi-Fi.
3. If you do not intend to use maritime cellular service, turn on airplane mode.
4. Then enable Wi-Fi separately if you want to connect to the ship’s Wi-Fi.
5. When going ashore, check your carrier’s rules for that country before turning cellular service back on.

11. Medical Care at Sea May Not Work Like Your Health Care at Home

A cruise ship may have a medical center, but do not treat it like an in-network urgent care clinic at home.

The State Department advises travelers to verify what medical and emergency-evacuation coverage they have before cruising. It also notes that the U.S. government does not pay travelers’ medical bills abroad.

For Medicare travelers, the limitation is especially important. Medicare says it generally does not cover health care outside the United States, with limited exceptions. On a cruise ship, Medicare Part B may cover medically necessary services only under specific conditions, including when the ship is in a U.S. port or no more than six hours away from a U.S. port and the other requirements are met.

Medical evacuation is a separate concern. The State Department advises checking whether your coverage includes evacuation and notes that specialized air evacuation can be extremely expensive depending on location and medical condition.

Before departure, check:

• Overseas coverage under your health insurance
• Deductibles and out-of-network rules
• Cruise-ship medical coverage
• Emergency medical evacuation coverage
• Whether payment may be required upfront
• How to file a reimbursement claim

This is different from deciding whether to buy trip-cancellation insurance. The question here is whether you can actually pay for and obtain care if you become ill or injured during the cruise.

12. Your Last Preparation Is for Getting Off the Ship — and Back On

Going ashore at a port feels casual because your cabin is waiting on the ship. But once you step off, you are in another country and operating on the ship’s schedule.

Before leaving the ship at each port, confirm:

• The ship’s time versus local time
• The required all-aboard time
• What identification or cruise card you must carry
• Whether you need your passport for that port
• Emergency contact information
• How you will get back to the ship
• Your phone/data plan ashore

Do not base your return time on what another passenger remembers from a different sailing. Itinerary and port instructions can change.

The State Department also recommends that cruise passengers have a backup plan for unexpected situations abroad and keep copies of passports, visas, and itineraries.

And remember that the final night requires planning too. If your cruise line collects checked bags the night before disembarkation, keep everything you will need overnight and the next morning with you.

Before You Go on a Cruise Checklist

Use this as a final check before leaving home:

• Verify passport, citizenship-document, visa, and destination entry requirements.
• Make sure the reservation name matches your travel documents.
• Complete cruise-line online check-in.
• Select or confirm your terminal arrival time.
• Save your boarding pass or eDocs offline.
• Download and sign in to the cruise line’s official app.
• Print or attach luggage tags if required.
• Review the latest prohibited-items policy for your cruise line.
• Verify alcohol and nonalcoholic beverage rules before packing drinks.
• Put passports and travel documents in your carry-on.
• Put prescription medication and essential medical supplies in your carry-on.
• Bring extra medication for possible delays.
• Check medication restrictions for every foreign destination.
• Pack first-day essentials separately from checked luggage.
• Check your mobile carrier’s cruise/maritime roaming policy.
• Plan to use airplane mode if you do not want maritime cellular service.
• Verify health and emergency-evacuation insurance coverage.
• Prepare for motion sickness if you are susceptible.
• Confirm transportation to the cruise terminal with enough time for disruptions.
• Know where to find final boarding and port all-aboard times.

FAQ

Do I need a passport for a cruise from the United States?

Not always. Some U.S. citizens on qualifying closed-loop cruises may use other approved citizenship documents, but itinerary, destination, cruise-line, and traveler-specific rules matter. The State Department recommends carrying a valid passport book because it can be necessary if you unexpectedly need to fly home from abroad.

How early should I check in for a cruise?

Follow your cruise line’s window. Current policies differ substantially: Royal Caribbean opens app check-in 45 days before sailing, Carnival’s online check-in window is within 14 days before sailing, and Norwegian makes its online check-in steps available 21 days before sailing and closes online check-in 3 days before departure.

Should medication go in checked cruise luggage?

No. Keep essential prescription medication in your carry-on so it remains accessible if checked luggage is delayed or lost. Cruise lines and the State Department also recommend carrying adequate extra medication and appropriate prescription documentation.

Should I use airplane mode on a cruise?

If you do not intentionally want maritime cellular roaming, yes. A phone can connect to a shipboard cellular network in international waters and generate carrier charges. You can normally turn airplane mode on and then enable Wi-Fi separately for ship Wi-Fi.

Can I bring a power strip on a cruise?

It depends on the cruise line. Royal Caribbean currently prohibits power strips and multi-plug outlets, while Carnival’s policy permits certain non-surge devices subject to safety review. Always check your cruise line’s current prohibited-items page instead of relying on a generic cruise packing list.

What should be in my cruise carry-on?

At minimum, keep travel documents, boarding documents, medication, valuables, essential medical items, and anything you need during the first hours onboard with you. A change of clothes or swimsuit can also be useful because checked luggage may not reach your cabin immediately.

Need a Ride to or From the Cruise Port?

If you are flying in for your cruise, compare the cost of a prebooked airport or hotel transfer with taxis, rideshare, cruise-line transfers, and rental cars.

Check transfer options with Suntransfers

The Bottom Line

Once the cruise is booked, the biggest risks are no longer choosing the wrong cabin or paying too much for the fare. They are showing up with the wrong documents, missing a check-in or boarding requirement, packing something the cruise line will not allow, losing access to medication or first-day essentials, and accidentally creating expenses you did not expect.

The best pre-cruise routine is simple: verify your exact itinerary’s document rules, complete check-in early, read your cruise line’s current policies instead of relying on an old packing list, keep critical items in your carry-on, and decide how you will handle phone service and medical coverage before you leave home.

Then, when embarkation day arrives, you can focus on getting on the ship instead of fixing a preventable problem at the terminal.

Sources

• U.S. Department of State — Cruise Ships
• U.S. Customs and Border Protection — Do I need a passport to go on a cruise?
• U.S. Department of State — Medicine and Health
• CDC — Cruise Ship Travel
• CDC Yellow Book — Motion Sickness
• Medicare — Travel Outside the U.S.
• Royal Caribbean — When Can I Check In With the App?
• Royal Caribbean — What Should I Do Before My Cruise?
• Royal Caribbean — Prohibited Items
• Royal Caribbean — Guest Health, Safety, and Conduct Policy
• Carnival — Online Check-In and Arrival Appointment
• Carnival — Embarkation and Departure
• Carnival — Cellular Phone Service
• Norwegian Cruise Line — Before You Cruise
• Norwegian Cruise Line — Required Travel Documents
• Princess Cruises — Pre-Cruise FAQ