Flights Seattle → Chicago

One way · Economy · 1 adult · price per person · next 14 days from September 10, 2026

Last observed price on Aviasales for 9 of 15 dates; the lowest is $162. Prices are not guaranteed and are confirmed at booking time.

Last observed price by date

Date	Last observed price	Flight	Departure	Arrival	Stops
Thu, Sep 10	—	—	—	—	—
Fri, Sep 11	$167	Alaska Airlines AS410	6:00 AM Sea-Tac (SEA)	12:07 PM O'Hare (ORD)	Direct
Sat, Sep 12	—	—	—	—	—
Sun, Sep 13	—	—	—	—	—
Mon, Sep 14	$174	Frontier Airlines F94204 (1st of 2 flights)	9:45 PM Sea-Tac (SEA)	5:38 AM (+2) O'Hare (ORD)	1 stop · Las Vegas Harry Reid
Tue, Sep 15	$175	Frontier Airlines F94668 (1st of 2 flights)	10:57 AM Sea-Tac (SEA)	5:38 AM (+1) O'Hare (ORD)	1 stop · Las Vegas Harry Reid
Wed, Sep 16	$201	Alaska Airlines AS410	6:00 AM Sea-Tac (SEA)	12:07 PM O'Hare (ORD)	Direct
Thu, Sep 17	—	—	—	—	—
Fri, Sep 18	$169	Frontier Airlines F92408 (1st of 2 flights)	7:45 PM Sea-Tac (SEA)	5:38 AM (+1) O'Hare (ORD)	1 stop · Las Vegas Harry Reid
Sat, Sep 19	$216	Southwest Airlines WN3534	11:05 PM Sea-Tac (SEA)	5:05 AM (+1) Midway (MDW)	Direct
Sun, Sep 20	$174	Frontier Airlines F94204 (1st of 2 flights)	9:45 PM Sea-Tac (SEA)	5:38 AM (+2) O'Hare (ORD)	1 stop · Las Vegas Harry Reid
Mon, Sep 21	—	—	—	—	—
Tue, Sep 22	—	—	—	—	—
Wed, Sep 23	$212	Frontier Airlines F94204 (1st of 2 flights)	9:45 PM Sea-Tac (SEA)	5:38 AM (+2) O'Hare (ORD)	1 stop · Las Vegas Harry Reid
Thu, Sep 24	$162lowest	Alaska Airlines AS410	6:00 AM Sea-Tac (SEA)	12:07 PM O'Hare (ORD)	Direct

Price not guaranteed: it is confirmed on Aviasales at booking time. How it works

Seattle, United States (SEA, city code)

Seattle-Tacoma (SEA).

Chicago, United States (CHI, city code)

Chicago O'Hare (ORD), Chicago Midway (MDW).

FromToDeparture date