For a quick snack before your flight, grab some Garrett Popcorn near gate B8, a Chicago favorite.
Round-trip from | $175 (Booking.com) |
---|---|
One-way from | $95 (Southwest) |
Popular in | December |
Cheapest in | February |
Average price | $289 |
Good round-trip deal | $240 or less |
Good one-way deal | $124 or less |
Fly from
Fly to
Route
Depart
Return
Price
ChicagoSeattle
MDW - SEA
MDWSEA
Chicago Midway
Thu 10/23
6:24 pm-7:33 am
1 stop15h 09m
Seattle/Tacoma Intl
Sun 10/26
2:31 pm-12:36 am
1 stop8h 05m
ChicagoSeattle
MDW - SEA
MDWSEA
Chicago Midway
Mon 9/15
4:48 pm-12:30 am
1 stop9h 42m
Seattle/Tacoma Intl
Mon 9/22
6:12 am-3:53 pm
1 stop7h 41m
ChicagoSeattle
MDW - SEA
MDWSEA
Chicago Midway
Fri 10/24
6:24 pm-12:07 pm
1 stop19h 43m
Seattle/Tacoma Intl
Sun 10/26
2:31 pm-12:36 am
1 stop8h 05m
ChicagoSeattle
MDW - SEA
MDWSEA
Chicago Midway
Mon 9/29
4:48 pm-12:30 am
1 stop9h 42m
Seattle/Tacoma Intl
Fri 10/3
6:12 am-3:53 pm
1 stop7h 41m
ChicagoSeattle
MDW - SEA
MDWSEA
Chicago Midway
Thu 10/23
6:24 pm-7:33 am
1 stop15h 09m
Seattle/Tacoma Intl
Mon 10/27
2:31 pm-12:24 am
1 stop7h 53m
ChicagoSeattle
MDW - SEA
MDWSEA
Chicago Midway
Thu 10/16
6:24 pm-7:33 am
1 stop15h 09m
Seattle/Tacoma Intl
Mon 10/20
2:31 pm-12:24 am
1 stop7h 53m
ChicagoSeattle
ORD - SEA
ORDSEA
Chicago O'Hare Intl
Tue 9/9
7:20 am-10:59 pm
1 stop17h 39m
Seattle/Tacoma Intl
Tue 9/16
7:00 am-9:28 pm
1 stop12h 28m
ChicagoSeattle
ORD - SEA
ORDSEA
Chicago O'Hare Intl
Tue 9/16
1:01 pm-3:35 pm
Nonstop4h 34m
Seattle/Tacoma Intl
Tue 9/16
5:55 pm-12:03 am
Nonstop4h 08m
ChicagoSeattle
MDW - SEA
MDWSEA
Chicago Midway
Sat 11/8
2:57 pm-8:18 am
1 stop19h 21m
Seattle/Tacoma Intl
Sat 11/15
12:58 pm-11:30 am
1 stop20h 32m
ChicagoSeattle
ORD - SEA
ORDSEA
Chicago O'Hare Intl
Sun 8/31
7:15 am-9:45 am
Nonstop4h 30m
Seattle/Tacoma Intl
Tue 9/9
7:10 am-1:17 pm
Nonstop4h 07m
The best time to book flights from Chicago to Seattle is 52 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, January is the cheapest month in which you can book a flight from Chicago to Seattle (average of $238). Flying from Chicago to Seattle in June is currently the most expensive (average of $388). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
It’s typically best to fly out from Chicago to Seattle in the evening. Doing so could potentially save you 16% on the flight price compared to flying in the morning, which is usually more expensive.
Travelers seeking maximum savings on their Chicago to Seattle flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from CHI to SEA are scheduled on a Monday (79 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (14 on average).
Denver (DEN) – chosen by Cheapflights users on 50% of 1-stop itineraries from Chicago to Seattle on Cheapflights.
Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $108.
Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 10h 20m.
Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 3h 07m.
Crew
Food
Overall
Boarding
Comfort
Entertainment
Reviews
Anonymous,Aug 2025
MFR - SEA
Crew
Food
Overall
Boarding
Comfort
Entertainment
Reviews
Anonymous,Aug 2025
MFR - SEA
Crew
Food
Overall
Boarding
Comfort
Entertainment
Reviews
Anonymous,Aug 2025
MFR - SEA
Crew
Food
Overall
Boarding
Comfort
Entertainment
Reviews
Anonymous,Aug 2025
MFR - SEA
Crew
Food
Overall
Boarding
Comfort
Entertainment
Reviews
Anonymous,Aug 2025
MFR - SEA
Crew
Food
Overall
Boarding
Comfort
Entertainment
Reviews
Anonymous,Aug 2025
MFR - SEA
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$90 | Average$250 | FlexibilityNo cancel fee | On-time85% | |
Cheapest$98 | Average$198 | FlexibilityNo cancel fee | On-time65% | |
Cheapest$118 | Average$248 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$119 | Average$288 | FlexibilityNo cancel fee | On-timeN/A | |
Cheapest$157 | Average$290 | FlexibilityNo cancel fee | On-time75% | |
Cheapest$168 | Average$324 | FlexibilityNo cancel fee | On-time69% | |
Cheapest$169 | Average$320 | FlexibilityNo cancel fee | On-time71% | |
Cheapest$194 | Average$413 | FlexibilityNo cancel fee | On-time63% |