O'Hare International (ORD) to Seattle-Tacoma International (SEA).
| Departure | Return | Price |
|---|---|---|
| 07/14/2026 | 07/21/2026 | $210 |
| 07/14/2026 | 07/22/2026 | $210 |
| 08/05/2026 | 08/11/2026 | $210 |
| 08/05/2026 | 08/10/2026 | $224 |
| 08/05/2026 | 08/13/2026 | $224 |
| 06/02/2026 | 06/08/2026 | $230 |
| 06/02/2026 | 06/09/2026 | $230 |
| 06/09/2026 | 06/16/2026 | $230 |
| 06/09/2026 | 06/17/2026 | $230 |
| 06/29/2026 | 07/08/2026 | $230 |
Based on current fares, August is the cheapest month to fly from Chicago to Seattle, with average fares around $229 round trip (as low as $210).
May tends to be more expensive, averaging $290.
See the full month-by-month and day-of-week price analysis
Best Time to Fly ORD → SEADeparture date prices (economy, round trip). Green = cheap, red = expensive.
The cheapest month to fly from Chicago to Seattle is August, with average round-trip fares around $229. Fares in August start as low as $210. The most expensive month is May, averaging $290.
A nonstop flight from Chicago to Seattle takes approximately 4h.
The cheapest flight from Chicago to Seattle currently starts at $210 round trip in economy class.
The average round-trip flight price from Chicago to Seattle is $289 in economy class.
The distance is 1721 miles (2769 km). with a nonstop flight time of about 4h. The lowest fare currently available is $210 departing in July. The average round-trip fare is $289.
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