Find out what you have actually booked
Open the booking details and look for a self-transfer warning. If the ticketing is unclear, ask the seller whether both flights are issued as a through ticket, who helps if the first flight is late, and whether any transfer guarantee has conditions. Two flights appearing in one checkout does not explain those protections by itself.
Compare the whole journey. An extra hotel night, a second baggage charge or transport between airports can change which option is cheaper. For a trip with an important event at the end, a through ticket or an overnight buffer can be a more comfortable choice than a tight separate-ticket connection.
Check the baggage destination at the first airport
At bag drop, ask where you will collect the suitcase and read the destination on the baggage receipt. Keep that receipt. Do not assume that using the same airline for both flights means the bag is checked through.
Heathrow gives a useful example of the difference: its self-connecting passengers must go through immigration, collect checked bags, exit arrivals, check in again and pass through security. Other airports have their own procedures, so use the connection instructions for the airport you will actually pass through.
Check entry permission, even when you only want to change planes
Look up the transit rules for your passport and route. Staying in an international transit area and entering the country are different situations. Collecting a checked bag, changing airports or using a terminal without an airside transfer may require entry permission.
Check this before buying the tickets. Tell the airline or relevant consulate your nationality, both flight numbers, whether the flights are separate tickets and whether you must collect luggage. A general answer about an airport layover may miss the part of your journey that changes the requirement.
Build the connection around the second flight’s deadlines
There is no safe universal answer to “Is two hours enough?” Write down the next airline’s bag-drop and gate deadlines, then allow for getting off the first plane, queues, terminal transport and security. Airport arrival time is not the same as being ready at the next gate.
With separate tickets, consider a much longer gap or an overnight stay if a missed flight would be expensive. Save terminal information and booking references offline. Once you arrive, find the next gate or check-in area before settling down for food.
If the first flight is delayed, contact the right people early
For a connecting ticket, contact the airline about your onward journey as soon as the delay threatens the connection. Check its app for a revised itinerary and ask what happens to your baggage.
For separate tickets, contact the second airline before its departure to ask about changes and no-show consequences. British Airways explains that separate bookings are separate contracts and limit the help airlines can provide for the next flight. Keep delay notices and check any insurance or seller guarantee rather than assuming automatic rebooking.
Check before you go
Airline allowances, check-in deadlines and airport rules can change. Check the rules for every flight in your booking before you travel.
