Google Flights supports "multi-city" travel plans that does exactly this!
Re:Hipmunk Says Goodbye
by benjaminRRR on Wednesday January 15, 2020 @04:00AM
(#22052729)
If there's one thing we do a reasonable job on it's multicity. Link in bio.
Re:Hipmunk Says Goodbye
by digitalnalogika on Tuesday January 14, 2020 @02:54PM
(#22048588)
kiwi.com?
Is there any other service allowing the same?