Cheap flights from Illinois (IL) to Seattle (SEA)

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How to find the cheapest flight from
Illinois to Seattle (SEA)

All the information you need to plan the best null to SEA flight in 2022: compare Illinois to Seattle flight prices with the expected peak season, weather and rainfall in Seattle.
When is the cheapest time to fly from Illinois to Seattle (IL - SEA)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Seattle as you normally would.

What is the cheapest month to fly from Illinois to Seattle?

August can be a great time to fly to Seattle from Illinois with a flight ticket averaging about $198. Cheapflights users have found deals in the month of August for as cheap as $86. The most expensive prices can be found in the month of December.

How far in advance should I book a flight from Illinois to Seattle?

Users have found that booking a flight from Illinois to Seattle at least 56 days early can save you up to 26% on average compared to booking a flight this week. If booking 56 days before your flight isn’t an option for you, users have found flights from Illinois to Seattle for as little as $215 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $233 for flights departing within the next 3 days.

Cheap flights from Illinois to Seattle in January, February 2022

The best prices found for Illinois to SEA flights for January, February
7 Feb - 10 Feb
$127pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
7 Feb - 10 Feb
$132pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
8 Feb - 10 Feb
$135pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl

Illinois to Seattle 2022 flight deals

Cheap flights to Seattle from Illinois found for this year
7 Feb - 10 Feb
$127pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
13 Apr - 18 Apr
$129pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
7 Feb - 10 Feb
$132pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl

Non-stop flights to Seattle from Illinois

Save time with Illinois to Seattle direct flight deals
26 Feb - 28 Feb
$135pp
ORD
Chicago O'Hare Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl
17 Feb - 17 Feb
$151pp
ORD
Chicago O'Hare Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl
17 Feb - 18 Feb
$156pp
ORD
Chicago O'Hare Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl

Last minute flights from Illinois to Seattle

Late deals on round-trip flights to Seattle from Illinois, departing today and this week
2 Feb - 6 Feb
$146pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
1 Feb - 10 Feb
$152pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
1 Feb - 2 Mar
$153pp
ORD
Chicago O'Hare Intl
Spirit Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
 
1 STOP
ORD
Chicago O'Hare Intl

One-way flights to Seattle/Tacoma Intl from Illinois

The cheapest one-way flights from Illinois to Seattle
4:22 pm - 5:09 am
Multiple Airlines
1 Stop
14h 47m
ORD - SEA
Multiple Airlines
$82
Kiwi.com
9:32 am - 7:14 pm
Frontier
1 Stop
11h 42m
ORD - SEA
Frontier
$87
Kiwi.com
12:00 pm - 5:39 pm
United Airlines
1 Stop
7h 39m
PIA - SEA
United Airlines
$88
United

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Illinois</span> to <span class="emphasized">Seattle</span> flights.

Flight FAQs

From Illinois to Seattle

What airport do you fly into for flights to Seattle from Illinois?

Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Illinois to Seattle.

Which airlines flying from Illinois to Seattle/Tacoma Intl have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Illinois to Seattle/Tacoma Intl that may be offering flexible cancellation policies are Alaska Airlines, Delta, and United Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

Can I find flights from Illinois to Seattle for under $200 on Cheapflights?

Yes, there are multiple flights from Illinois to Seattle for under $200. The cheapest flight booked recently is on Frontier for just $127, but on average you can expect to pay $142.

Are there nonstop flights from Illinois to Seattle for under $200 on Cheapflights?

Cheapflights has at least 20 direct flights from Illinois to Seattle under $200. A good price for a nonstop flight from Illinois to Seattle is less than $167.

Are there last-minute flights available from Illinois to Seattle for under $200?

There are currently 20+ open flights from Illinois to Seattle within the next 7 days for less than $200.

What days are nonstop flights available from Illinois to Seattle?

Days when nonstop flights are available for this flight are: Sunday, Monday, Wednesday, Thursday, Friday, Saturday.

How many flights depart from Illinois to Seattle on average per day?

Per day, 38 flights depart from Illinois to Seattle on average.
Morning (6am - Noon) - 18% of flight departures
Afternoon (Noon - 6pm) - 47% of flight departures
Evening (6pm - Midnight) - 34% of flight departures

How long is the flight from Illinois to Seattle?

Departing from Illinois to Seattle will take you 4h 40m. The distance between Illinois and Seattle is about 1725 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines to fly from Illinois to Seattle one-way?

The cheapest airlines for a one-way flight from Illinois to Seattle are Frontier ($63), Spirit Airlines ($73), and Alaska Airlines ($79).

What are the most popular routes from Illinois to Seattle?

The most popular route from Illinois to Seattle is Chicago O'Hare Intl - Seattle/Tacoma Intl. You may also consider Chicago Midway - Seattle/Tacoma Intl or Lambert-St Louis - Seattle/Tacoma Intl.

What are the cheapest flights from Illinois to Seattle?

The cheapest flight price from Illinois to Seattle is $59. On average you can expect to pay $334. The most popular route, (Chicago O'Hare Intl - Seattle/Tacoma Intl), can usually be booked for $148.

What are the most reliable airlines from Illinois to Seattle?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to Seattle on time: LOT (100%), China Airlines (100%), SAS (90%).

What are the most popular airlines that fly from Illinois to Seattle?

Before booking your flight from Illinois to Seattle check out the most popular airlines for this route: Major Airline, American Airlines or Alaska Airlines.

Related searches

Flights to Seattle (SEA) from Illinois
Flights to Illinois Flights to Seattle Flights from Seattle

Rent a Car

Car Rentals in Seattle Car Rentals in Washington

COVID Restrictions

View COVID Travel Restrictions for Seattle, WA

Do I need a COVID test to fly to Seattle from Illinois?

Information is based on travel restrictions for travel to Seattle/Tacoma Intl within the United States

Most visitors from Illinois need to provide a negative COVID-19 test result and/or quarantine to enter Seattle/Tacoma Intl.

COVID-19 testing requirements
Visitors from Illinois must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Seattle/Tacoma Intl.

Quarantine requirements
Visitors from Illinois are not required to quarantine after entering Seattle/Tacoma Intl.

Do I need a test to fly back to Illinois from Seattle?

Returning to Illinois from Seattle/Tacoma Intl

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Illinois.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering Illinois.

Hide COVID Travel Restrictions for Seattle, WA

Departure points for flights from Illinois to Seattle

Select to see more specific information for flights to Seattle from all departure points in Illinois.

Destination information for Seattle

Things to know before you go - useful duration and weather info for your trip from Illinois to Seattle.
Flight duration from Illinois to SEA
4h 22m
Average temperature for January in Seattle
48.2 °F
Avg rainfall for January in Seattle
5.7 ″

Airports servicing

Bloomington (BMI)
Champaign (CMI)
Decatur (DEC)
Moline (MLI)
Marion (MWA)

Airports servicing Seattle

Top 6 airlines flying from Illinois to Seattle/Tacoma Intl

The chart below displays the airlines Cheapflights users traveling from Illinois to Seattle choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Alaska Airlines
$86 $300 No cancel fee 75%
Delta
$86 $368 No cancel fee N/A
United Airlines
$90 $359 No cancel fee 69%
Frontier
$92 $187 No cancel fee 62%
Spirit Airlines
$94 $203 No cancel fee 65%
American Airlines
$105 $415 No cancel fee 71%
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