Seattle to Chicago flights (SEA → ORD)
Looking for Seattle to Chicago flights? Cheapest round-trip I’ve found: US$342 on Frontier, 1 stop(s), departing 2027-03-01. That’s US$6 below the typical price for this route. Cheap flights from Seattle to Chicago change daily — I re-check this route three times a day.
Deal score: Higher than usual — cheaper than 12% of prices I’ve seen on this route.
Best months to fly Seattle to Chicago
| Month | Cheapest seen |
|---|---|
| February | US$185 |
| September | US$252 |
| October | US$253 |
| December | US$281 |
| March | US$342 |
How to book this fare
I don’t sell tickets — I track prices and point you to where to look. To book Seattle to Chicago flights:
- Search Seattle to Chicago on Google Flights for the dates shown above (Mar 2027) — the fare I found is usually still available there.
- Compare the same dates on metasearch sites like Skyscanner or KAYAK to confirm you’re seeing the lowest price.
- Book directly with the airline when you can — it’s often the same price and makes changes or cancellations much easier.
Fares change constantly. If the price has moved, check back — I re-check this route daily.
Other Seattle to … flights
- Seattle to Cusco flights — US$1,058
- Seattle to Queenstown flights — US$1,310
- Seattle to Christchurch flights — US$1,228
- Seattle to Rio de Janeiro flights — US$1,047
- Seattle to Perth flights — US$1,211
- Seattle to Belo Horizonte flights — US$1,513
- Seattle to Asuncion flights — US$1,574
- Seattle to Brasilia flights — US$1,487
All flights to Chicago · All flights from Seattle
Prices last checked: 2026-09-25, 6:13:52 a.m.. Prices are indicative and change quickly — confirm on the airline site before booking. See how I find these deals.