You find a good fare, recognize the city and start imagining the trip. Then, while arranging the train or the first night’s hotel, you notice three unfamiliar letters beside the arrival time.
A city search is a starting point
A search for a metropolitan area can help you compare more flights. It does not mean that every result arrives at the same place.
IATA explains that airports in a multi-airport metropolitan area have their own codes; the area may also have a separate code or use one of the airport codes. Its Washington example makes the distinction clear: WAS represents the metropolitan area, while DCA, BWI and IAD identify the three airports in that group.
Use the broad search to explore your choices, then open the flight details. The airport on the selected flight is the one to use for the rest of your planning. If a code is unfamiliar, our airport-code finder can help you look it up; confirm the result against your airline’s itinerary.
Tokyo: check whether it says HND or NRT
Haneda is HND; Narita is NRT. Both serve travelers visiting Tokyo, but they are separate airports with different access journeys. A hotel booking that says “Tokyo” does not settle which one suits your plans.
Consider an illustrative itinerary: your first flight arrives at NRT, and your next flight leaves from HND. That is an airport change. You need a ground-transfer plan between the two airports, rather than directions to another gate.
JAL’s connection guidance separates connections within an airport from transfers between Haneda and Narita. It also explains that connection requirements vary by airport and airline, and that meeting a minimum does not guarantee a connection when disruption occurs.
Before choosing that itinerary, check the airline’s requirements for those exact flights and the transport available on your travel date. Include arrival formalities, any baggage collection, the trip between airports and the next flight’s check-in deadline in your questions. A train’s journey time alone is not a connection allowance.
London: an airport change can include your bags
London offers another useful example. Heathrow, LHR, and Gatwick, LGW, are different airports. A change from a Heathrow terminal to another Heathrow terminal is a different journey from a transfer to Gatwick.
For transfers between Heathrow and Gatwick, British Airways says baggage is not forwarded automatically: passengers must collect it before leaving the airport. Its guidance also tells passengers changing London airports to check the documents required to enter the UK.
Those are reasons to read the transfer instructions before booking. Ask your airline what happens to your bags and who arranges the ground journey. Check any entry requirements through the official government guidance linked by the airline. Do not assume that an “international connection” label means you can stay in an airport’s transit area throughout.
Compare the whole arrival, not just the fare
For a trip that ends in the city, compare each airport with the place you are actually staying. Look up transport to the hotel or neighborhood, at the hour you expect to leave arrivals. Check service hours, changes, luggage arrangements and the final walk.
A cheaper flight may still be the right choice. The comparison becomes more useful when you add the likely ground-transport cost and consider an early departure or late arrival. “Closer to the city” is less helpful than knowing how you will reach your own address.
Use current airport and transport-operator information when making that decision. A route you used on a previous visit may have different hours or arrangements now.
Read the return flight as a new journey
Check the departure airport on the way home separately. Arriving at one airport and leaving from another can suit a trip perfectly well, provided you plan for it.
Before booking an airport hotel, car rental or return transfer, match it to the airport on that particular flight. Share the full airport name and code with anyone meeting you. A message that says “Haneda, HND” is clearer than “the Tokyo airport.”
Repeat the check after an itinerary change. Work from the current booking confirmation rather than an old screenshot, saved calendar entry or transport reservation.
Five things to check before paying
- Each flight’s airport: expand the details and read the full names and codes for departure and arrival.
- Each connection: compare the arrival airport with the next departure airport. If they differ, investigate the transfer before choosing the fare.
- Bags and booking arrangements: confirm collection, recheck, separate tickets and what your airline will do if a delay affects the next flight.
- The ground journey: check transport, operating hours and costs for your actual hotel or onward destination.
- The return: verify its airport independently, then match any hotel, rental-car return and transfer booking to it.
You do not need to memorize a directory of airport codes to make a good booking. You need to recognize the few on your own itinerary and know what they mean for the journey. If you would like those familiar places to stick, our guide to learning airport codes and cities takes that next step.
For now, pause on the flight details. Three letters are a small thing to check before a big trip.
Sources and review date
Checked on . Airport examples and connection guidance were checked against the linked official sources. Confirm current transport, baggage arrangements and connection requirements for your own itinerary.
