Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from Chicago to Seattle
The cheapest flights right now
Chicago – Seattle
Outbound – Oct 11, 2026
direct
4h 41m Return – Oct 18, 2026
direct
4h 6m $311
2 days ago
Chicago – Seattle
Outbound – Oct 15, 2026
direct
4h 37m Return – Oct 22, 2026
direct
3h 59m $325
2 days ago
Chicago – Seattle
Outbound – Oct 10, 2026
direct
4h 42m Return – Oct 18, 2026
direct
3h 59m $321
2 days ago
Chicago – Seattle
Outbound – Oct 15, 2026
direct
4h 35m Return – Oct 22, 2026
direct
4h 3m $317
today
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Cheapest flight tickets
$201
Average price of a round trip
$298
Average flight ticket price recorded over the last 3 months for a round trip.
Flight duration
4h35
A flight from Chicago to Seattle takes on average 4h35.
Best time
December
According to user searches, the ideal month to go to Seattle is December.
What is the cheapest month for this flight?
Monthly price data (Table View)
October
Oct
$214
November
Nov
$131
December
Dec
$174
January
Jan
$114
February
Feb
$0
March
Mar
$0
April
Apr
$0
May
May
$290
June
Jun
$232
July
Jul
$279
August
Aug
$0
September
Sep
$348
* The prices shown are an average per month of the prices found by Liligo users during the last 30 days.
The best flight deals for a week
Chicago – Seattle
Outbound – Oct 11, 2026
direct
4h 41m Return – Oct 18, 2026
direct
4h 6m $311
2 days ago
Chicago – Seattle
Outbound – Oct 10, 2026
direct
4h 42m Return – Oct 17, 2026
direct
4h 24m $326
2 days ago
Chicago – Seattle
Outbound – Oct 10, 2026
direct
4h 42m Return – Oct 18, 2026
direct
3h 59m $321
2 days ago
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Tips for finding a cheap flight from Chicago to Seattle
Check out our tips for booking your flight to Seattle (USA) from Chicago (USA) at the cheapest possible price.
Usually, the cheapest month to pick up a ticket on this route is January, with an average flight ticket price of $115 (calculation over the last two years). The most touristic season corresponds to the months of December, September and January.
For the cheapest flights, it is advisable to buy your ticket at least 19 days before the departure date.
The airline offering the cheapest flight tickets is Frontier Airlines. A ticket from the airline Frontier Airlines to Seattle costs on average $274.
The airlines that offer the most flights are American Airlines, Alaska Airlines and United Airlines.
Price of flight tickets from Chicago to Seattle
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from $201 to $356
- The average price of a flight ticket is about $298
- Prices are lowest for stays in the month of January
- The month in which booking a ticket is cheaper is: September
info departure city :
Chicago, USA
airports :
Chicago-Merrill C. Meigs Field Airport (CGX)
Chicago FSS (CHI)
Chicago-Midway International Airport (MDW)
Chicago-O'Hare International Airport (ORD)
local time :
Chicago is a city in the country USA, the time zone is [[timezone]]. In Chicago, it is currently {fromLocalTime}, the temperature is on average 16°C, with a minimum of 14°C and a maximum of 18°C.
The city of Chicago (CHI) has 4 airport(s): Chicago-Merrill C. Meigs Field, Chicago FSS, Chicago-Midway and Chicago-O'Hare
destination info :
Seattle, USA
airports :
Kenmore Air Harbor Spb. (LKE)
Seattle-Tacoma International Airport (SEA)
Renton Municipal Airport (RNT)
King County International Airport (BFI)
local time :
Seattle is in the country USA, the time zone is [[timezone]]. In Seattle, it is currently {toLocalTime}, the temperature is on average 16°C, with a minimum of 11°C and a maximum of 22°C.
The city of Seattle (SEA) has 4 airport(s): Kenmore Air Harbor Spb., Seattle-Tacoma, Renton and King County
Useful info about Seattle
What is the least touristic period to go to Seattle?
If you want to visit Seattle during the least touristic period, choose the month of December.
What is the most popular time to travel to Seattle?
In Seattle, the most popular month is December. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight from Chicago to Seattle?
According to our data, it is recommended to book your flight 19 days before your departure. If you book your flight ticket 3 weeks before your departure, you may find a price below average. You can also choose morning flights that are 100% cheaper than afternoon and evening flights. The cheapest day to book a flight from Chicago to Seattle is Tuesday.
What are the arrival and destination airports when traveling between Chicago and Seattle?
When you leave, you can leave from Chicago-Midway or Chicago-O'Hare, and you will arrive at Seattle-Tacoma.
How to reach Chicago airport from the city centre?
The airport Chicago-Merrill C. Meigs Field is located 4 km, Chicago FSS is located 29 km, Chicago-Midway is located 12 km or Chicago-O'Hare is located 29 km from the city centre. You can access it by using public transportation, taking a taxi, or renting a car.
Are there other means of transportation to go from Chicago to Seattle?
Airplane is the only means of transportation listed on Liligo for this journey.
Are there big differences in weather between Chicago and Seattle?
In summer, the average temperature is 18°C in Seattle and 22°C in Chicago. The average rainfall in summer is 38 mm in Seattle and 145 mm in Chicago. In summer, it is warmer in Chicago and it rains less in Seattle. In winter, it is colder in Seattle and it rains more in Seattle.
