Chicago to Seattle
ORDSEA
Fly from Chicago to Seattle starting at USD 147 with Frontier Airlines.
Best fare available on Sep 5, 2026.
Limited seats. Better plans. Book before it's gone.
Chicago to Seattle cheapest flights this week
Chicago to Seattle monthly flight fare trend
Sep
from USD 96
Oct
from USD 107
Nov
from USD 151
Dec
from USD 178
Jan
No flights
Feb
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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