Chicago to Seattle
MDWSEA
Fly from Chicago to Seattle starting at USD 145 with Southwest Airlines.
Best fare available on Aug 19, 2026.
Limited seats. Better plans. Book before it's gone.
Chicago to Seattle cheapest flights this week
Chicago to Seattle monthly flight fare trend
Aug
from USD 145
Sep
from USD 130
Oct
from USD 134
Nov
No flights
Dec
from USD 204
Jan
No flights
Airport Details
Origin
Chicago
Chicago Midway International Airport (MDW)
Chicago, MDW
Zone
Chicago
Elev
620 ft
Destination
Seattle
Seattle–Tacoma International Airport (SEA)
Seattle, SEA
Zone
Los Angeles
Elev
433 ft
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