Cheap flights from Seattle to Chicago
Cheapest current fares: $142 in September 2026, 2,761 km direct flight in ~3h 15m.
Cheapest month-by-month fares
Lowest available fare per calendar month from Seattle (SEA) to Chicago (ORD). Refreshed daily.
Seattle (SEA) → Chicago (ORD)
- September 2026 $142
- June 2026 $167
- May 2026 $170
- October 2026 $185
Frequently asked questions
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What is the cheapest month to fly from Seattle to Chicago?
Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Seattle (SEA) to Chicago (ORD), with fares starting from $142.
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What is the lowest current fare from SEA to ORD?
The lowest currently-listed fare from Seattle (SEA) to Chicago (ORD) is $142 on 2026-09-08.
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How long is the flight from Seattle to Chicago?
Direct flights from SEA to ORD 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.