Cheap flights from Chicago to Seattle
Cheapest current fares: $138 in September 2026, 2,761 km direct flight in ~3h 15m.
Cheapest month-by-month fares
Lowest available fare per calendar month from Chicago (ORD) to Seattle (SEA). Refreshed daily.
Chicago (ORD) → Seattle (SEA)
- September 2026 $138
- October 2026 $153
- August 2026 $159
Frequently asked questions
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What is the cheapest month to fly from Chicago to Seattle?
Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Chicago (ORD) to Seattle (SEA), with fares starting from $138.
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What is the lowest current fare from ORD to SEA?
The lowest currently-listed fare from Chicago (ORD) to Seattle (SEA) is $138 on 2026-09-24.
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How long is the flight from Chicago to Seattle?
Direct flights from ORD to SEA cover approximately 2,761 km (1,716 miles), with an estimated flight time of 3h 15m. Operating airlines: AA, AS, DL, UA.
Related guides for this route
Sibling pages — full route detail, airport overviews, visa context, per-airline routes.