
| Most accurate provider | CheapOair 3 stars | 
|---|---|
| Most trusted provider | CheapOair 3 stars | 
| Round-trip from | $162 (Priceline) | 
| One-way from | $65 (Priceline) | 
| Popular in | December | 
| Cheapest in | February | 
| Average price | $257 | 
| Good round-trip deal | $248 or less | 
| Good one-way deal | $136 or less | 
Fly from
Fly to
Route
Depart
Return
Price
ChicagoSeattle
ORD - SEA
ORDSEA
Chicago O'Hare Intl
Thu 1/22
2:20 pm-5:00 pm
Nonstop4h 40m
Seattle/Tacoma Intl
Sun 1/25
7:10 am-1:22 pm
Nonstop4h 12m
ChicagoSeattle
ORD - SEA
ORDSEA
Chicago O'Hare Intl
Thu 12/11
9:02 am-11:45 am
Nonstop4h 43m
Seattle/Tacoma Intl
Sat 12/13
7:00 am-1:09 pm
Nonstop4h 09m
ChicagoSeattle
ORD - SEA
ORDSEA
Chicago O'Hare Intl
Sat 12/6
3:35 pm-6:22 pm
Nonstop4h 47m
Seattle/Tacoma Intl
Sat 12/13
8:25 am-2:39 pm
Nonstop4h 14m
ChicagoSeattle
ORD - SEA
ORDSEA
Chicago O'Hare Intl
Wed 1/14
3:35 pm-6:22 pm
Nonstop4h 47m
Seattle/Tacoma Intl
Wed 1/21
7:50 pm-1:10 pm
1 stop15h 20m
ChicagoSeattle
MDW - SEA
MDWSEA
Chicago Midway
Sat 2/14
3:15 pm-10:50 pm
1 stop9h 35m
Seattle/Tacoma Intl
Sat 2/28
10:55 am-8:00 pm
1 stop7h 05m
ChicagoSeattle
MDW - SEA
MDWSEA
Chicago Midway
Sat 12/6
8:30 am-11:10 am
Nonstop4h 40m
Seattle/Tacoma Intl
Fri 12/12
6:35 am-12:30 pm
Nonstop3h 55m
ChicagoSeattle
ORD - SEA
ORDSEA
Chicago O'Hare Intl
Wed 12/17
7:50 am-10:41 am
Nonstop4h 51m
Seattle/Tacoma Intl
Sun 1/11
5:55 pm-11:53 pm
Nonstop3h 58m
ChicagoSeattle
ORD - SEA
ORDSEA
Chicago O'Hare Intl
Fri 12/5
3:35 pm-6:22 pm
Nonstop4h 47m
Seattle/Tacoma Intl
Mon 12/15
4:21 pm-10:30 pm
Nonstop4h 09m
ChicagoSeattle
ORD - SEA
ORDSEA
Chicago O'Hare Intl
Wed 11/19
2:05 pm-6:48 pm
1 stop6h 43m
Seattle/Tacoma Intl
Sat 11/22
12:25 am-6:28 am
Nonstop4h 03m
ChicagoSeattle
ORD - SEA
ORDSEA
Chicago O'Hare Intl
Wed 12/3
3:05 pm-9:43 pm
1 stop8h 38m
Seattle/Tacoma Intl
Sat 12/6
4:21 pm-10:30 pm
Nonstop4h 09m
Currently, September is the cheapest month in which you can book a flight from Chicago to State of Washington (average of $113). Flying from Chicago to State of Washington in December is currently the most expensive (average of $177). 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 State of Washington at noon. Doing so could potentially save you 35% on the flight price compared to flying in the afternoon, which is usually more expensive.
Travelers seeking maximum savings on their Chicago to State of Washington flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Crew
Overall
Food
Comfort
Boarding
Entertainment
Reviews
Anonymous,Aug 2025
MFR - SEA
Crew
Overall
Food
Comfort
Boarding
Entertainment
Reviews
Anonymous,Aug 2025
MFR - SEA
Crew
Overall
Food
Comfort
Boarding
Entertainment
Reviews
Anonymous,Aug 2025
MFR - SEA
Crew
Overall
Food
Comfort
Boarding
Entertainment
Reviews
Anonymous,Aug 2025
MFR - SEA
Crew
Overall
Food
Comfort
Boarding
Entertainment
Reviews
Anonymous,Aug 2025
MFR - SEA
Crew
Overall
Food
Comfort
Boarding
Entertainment
Reviews
Anonymous,Aug 2025
MFR - SEA
| Airline | Cheapest | Average | Flexibility | On-time | 
|---|---|---|---|---|
| Cheapest$91 | Average$251 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$105 | Average$202 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$122 | Average$339 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$142 | Average$264 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$169 | Average$454 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$172 | Average$333 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$176 | Average$366 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$189 | Average$454 | FlexibilityNo cancel fee | On-time63% |