Chicago to Seattle
ORDSEA
Fly from Chicago to Seattle starting at USD 159 with Frontier Airlines.
Best fare available on Sep 1, 2026.
Limited seats. Better plans. Book before it's gone.
Chicago to Seattle cheapest flights this week
Chicago to Seattle monthly flight fare trend
May
from USD 116
Jun
from USD 168
Jul
No flights
Aug
from USD 173
Sep
from USD 159
Oct
No flights
Airport Details
Origin
Chicago
Chicago O'Hare International Airport (ORD)
Chicago, ORD
Zone
Chicago
Elev
680 ft
Destination
Seattle
Seattle–Tacoma International Airport (SEA)
Seattle, SEA
Zone
Los Angeles
Elev
433 ft
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