How to check in online, and how early to arrive for an international flight
Steps for checking in by app or web, when the window opens, bag drop, and the factors that decide how early to get to the airport, without fixed numbers.
Quick answer
- You can check in online on the airline's website or app by entering the booking reference and surname, choosing a seat, confirming passport details and saving the boarding pass on your phone. When online check-in opens and closes differs by airline and route, so read it in your booking confirmation email.
- As for how early to arrive, there is no single figure for every case. International flights usually need earlier arrival than domestic ones, but the right time depends on the airport, airline, bag drop, how busy it is and immigration. Read the counter closing time your airline states, and add your own buffer.
What online check-in is and why use it
Online check-in means confirming you will take the flight through the website or app rather than at the counter. The benefits are choosing your own seat, getting the boarding pass on your phone, and, if you have no checked bag, possibly going straight to security. On some airlines and some international routes, staff must still verify documents at a counter, so read the conditions in your airline's email.
How to check in online: the steps
- 1Find the booking confirmation emailHave the booking reference (PNR) and surname as in the passport. If you bought through an agent, check whether you can check in directly with the airline or must go through the agent.
- 2Open the airline's website or appUse the airline's official channel, do not click odd links in messages, and choose the check-in menu.
- 3Confirm passenger and document detailsThe system may ask for passport, visa or accommodation address details, depending on the destination's requirements. Enter them exactly as on your documents.
- 4Choose a seat and extrasSome tickets allow free seat choice and others charge. Read your ticket's conditions before confirming.
- 5Save the boarding passSave it in your phone wallet or the airline's app and take a screenshot as backup, since airport signal can be unreliable. Print one copy if the airline or destination suggests it.
When online check-in opens and closes
A very common search is how many hours before departure online check-in opens. The answer is set by each airline and can vary by route, ticket type or baggage type. Airlines usually open the window some time before departure and close it a set period before departure, but the actual figures are in your confirmation email or manage-booking page.
Bag drop after online check-in
If you have checked baggage, you still need to go to the bag-drop counter to weigh and hand over the bag, which may be a separate or quicker line than regular check-in but still has a hard closing time. If you arrive after it closes, you may not be able to fly even though you checked in online.
How early should you arrive at the airport?
Rather than memorise a number, work backwards from the counter closing time or boarding gate closing time, then add buffer for the unexpected. The time an airline states is a minimum, not the most comfortable time, and you should arrive earlier when several risk factors stack up.
International flights: the factors that decide how early
| Factor | Why it matters | What to do |
|---|---|---|
| Large airport or busy period | Longer queues at check-in, security and immigration | Arrive earlier and watch airport notices |
| Checked baggage | Must pass the bag-drop counter with a hard cutoff | Check the counter cutoff in the airline's email |
| Special documents or visa | Some routes need staff to check documents first | Check conditions with the airline and the destination's official site |
| Travelling with children or older passengers | Everything takes longer | Add more buffer |
| Getting to the airport | Traffic or transit may be delayed or change schedules | Choose a backup route and leave earlier than calculated |
| Onward connection on the same ticket | A late first flight may affect the next | See our flight connections article |
If the airline or airport states a recommended time, use it as the base and add more for the factors above. For a first trip, allow more than usual, since the airport process is new to you. See our airport and immigration basics guide.
What to check the day before and at the airport
- Check the airline's email for flight time or terminal changes
- Boarding pass on your phone with a screenshot backup, and a charged phone
- Passport and documents in your cabin bag
- Have your eSIM installed or another way online ready to receive gate and flight-change notices
Staying online at the airport
Gate changes and airline app notifications need data. A data-only eSIM can be installed before you fly, has no phone number or SMS, and lets you retrieve a boarding pass without hunting for airport Wi-Fi. See our guide on airport arrival connectivity.
Frequently asked questions
FAQ
How do I check in online?+
Open the airline's website or app, enter the booking reference and surname, confirm document details, choose a seat, then save the boarding pass on your phone with a screenshot backup.
How many hours before the flight can I check in online?+
Each airline sets its own, and it can differ by route or ticket type. Read it in your booking confirmation email or manage-booking page rather than using another airline's figure.
How early should I go to the airport?+
No single figure fits every case. Look at the counter closing time your airline states, then add buffer for factors such as a large airport, busy periods, checked bags and getting to the airport.
Does an international flight need earlier arrival than a domestic one?+
Generally yes, because of added document and immigration checks, but the actual time differs by airport and airline. Follow what the airline and airport state.
Do I still need to go to the counter after checking in online?+
If you have checked baggage, you must go to the bag-drop counter, and some routes need staff to check documents first. With no checked bag and no special condition, you may go straight to security. Read the conditions in your airline's email.
What if online check-in does not work?+
Try again directly with the airline's app or website, and check the name matches the booking reference. If it still fails, check in at the counter, arriving early enough before it closes. If you bought through an agent, contact the agent.
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