The earliest you can check your bags vary based on the airline and airport policies. But in general, the earliest time you can check your bags is 2-4 hours before flight time. Some may allow up to 6 hours, but most international flights won't accept check-in earlier than that.

For most international airlines in 2026, the baggage drop-off counters typically open 3 to 4 hours before the scheduled departure time. For example, major carriers at hubs like London Heathrow (LHR) or Toronto Pearson (YYZ) often allow passengers to check in their bags exactly 240 minutes before takeoff. Domestic flights usually have a shorter window, with counters opening 2 hours prior. It is important to note that many modern airports now feature automated "self-service" bag drops that can be accessed as soon as you have your digital boarding pass, provided it is within the airline's specific time window. However, most airlines have a strict "cutoff" for bag drops—usually 45 to 60 minutes before departure—after which no further luggage will be accepted to ensure the aircraft can be loaded and balanced on schedule.