I am hoping someone can explain this to me. I am looking for a 1-stop flight from Thessaloniki (SKG) to Seattle (SEA) for August 2023. All the options that I am getting on Google Flights (or any other website) show layovers > 8 hours. The layovers are in Amsterdam (AMS) or Frankfurt (FRA), and the departing flight leaves later in the day, e.g., AMS to SEA on August 27 leaves at 2:30 pm.
What I don't understand is that if I look for flights to the above example SKG to AMS there is a flight leaving 9:45 AM with Transavia and arrives 11:50AM in AMS. That is sufficient (2:30 hours layover) to catch the Delta flight to SEA at 2:30 PM. I have been to that airport and done that before.
But no website shows this as an option when I put for a 1 stop flight from SKG to SEA. I know I can book these through separate itineraries, but it would be nice to be able to check my luggage all the way to my destination.
Any ideas on what are my options? Also, do airlines release the schedule for August 2023 months in advance or do I have to wait until January for more options to appear?