Originally Posted by
redfrog
...
Example trip 1: leave Sept 15, 2025 from USA to Europe and return to USA June 15, 2025 (school year)
I think you mean June 15, 2026 which is not bookable now. Something like 11 months into the future is bookable.
trip 2 - leave March 15, 2026 from Europe and return March 30, 2026 to Europe (spring break)
Once again March 20, 2026 is beyond the 11 months into the future you can book now. You can buy a ticket now and change the dates but just beware that trips originating From Europe to the USA may have a significant change fee. Read the fare rules for your specific flight.
See notes above in the "spoiler+"