Good to know

Low season	February	Best time to beat the crowds with an average 4% drop in price.
High season	March	Most popular time to fly with an average 6% increase in price.
Average price of a round-trip	$371	(avg. price over the last 2 weeks)
Good deal for a round-trip	$163	or less

FAQs for booking Illinois to Seattle/Tacoma Airport flights

How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?

Top 3 airlines serving Illinois to Seattle/Tacoma Intl

Scores according to KAYAK customer reviews

8.0

Delta

Overall score based on 28,441 reviews

8.2

Boarding

7.8

Comfort

8.5

Crew

7.8

Entertainment

7.5

Food

Airline reviews

Book cheap flights from Illinois to Seattle/Tacoma Airport (round-trip)

Airports

Origin

Destination

Spirit Airlines

Thu, Aug 6

4h 28m

Mon, Aug 10

3h 57m

$74

Trip: 5 days

Based on null reviews

Multiple Airlines

Wed, Sep 2

4h 28m

Sat, Sep 12

3h 43m

$96

Trip: 11 days

Based on null reviews

Delta

Sat, Aug 8

4h 37m

Sat, Aug 15

3h 55m

$119

Trip: 8 days

Based on null reviews

Spirit Airlines

Thu, Aug 6

4h 28m

Fri, Aug 14

3h 57m

$75

Trip: 9 days

Based on null reviews

Spirit Airlines

Sat, Aug 15

4h 28m

Fri, Aug 21

3h 57m

$86

Trip: 7 days

Based on null reviews

Multiple Airlines

Fri, Aug 7

4h 28m

Mon, Aug 10

3h 57m

$97

Trip: 4 days

Based on null reviews

Multiple Airlines

Wed, Aug 5

4h 28m

Thu, Aug 13

3h 52m

$98

Trip: 9 days

Based on null reviews

Spirit Airlines

Tue, Sep 1

4h 28m

Mon, Sep 7

3h 57m

$94

Trip: 7 days

Based on null reviews

Delta

Sat, Aug 8

8h 55m

Sat, Aug 15

3h 55m

$123

Trip: 8 days

Based on null reviews

Multiple Airlines

Sat, Aug 8

8h 00m

Mon, Aug 10

3h 57m

$102

Trip: 3 days

Based on null reviews

Spirit Airlines

Tue, Aug 4

10h 24m

Mon, Aug 10

3h 57m

$100

Trip: 7 days

Based on null reviews

Delta

Thu, Sep 3

8h 11m

Mon, Sep 14

7h 22m

$128

Trip: 12 days

Based on null reviews

Multiple Airlines

Wed, Jul 29

4h 40m

Tue, Aug 4

3h 57m

$106

Trip: 7 days

Based on null reviews

Spirit Airlines

Thu, Aug 6

4h 28m

Tue, Aug 11

15h 19m

$101

Trip: 6 days

Based on null reviews

Multiple Airlines

Fri, Aug 7

4h 28m

Mon, Aug 17

4h 03m

$107

Trip: 11 days

Based on null reviews

Spirit Airlines

Mon, Aug 3

10h 24m

Fri, Aug 7

3h 57m

$103

Trip: 5 days

Based on null reviews

Multiple Airlines

Fri, Aug 14

4h 28m

Mon, Aug 17

4h 03m

$108

Trip: 4 days

Based on null reviews

Delta

Fri, Sep 4

6h 49m

Mon, Sep 7

6h 36m

$149

Trip: 4 days

Based on null reviews

Spirit Airlines

Thu, Aug 13

4h 28m

Tue, Aug 18

15h 19m

$104

Trip: 6 days

Based on null reviews

Multiple Airlines

Thu, Aug 6

4h 28m

Thu, Aug 13

9h 49m

$111

Trip: 8 days

Based on null reviews

Book cheap flights from Illinois to Seattle/Tacoma Airport (one-way)

Airports

Origin

Destination

Spirit Airlines

Wed, Aug 19

4h 28m

$36

Based on null reviews

Delta

Sat, Aug 1

4h 37m

$60

Based on null reviews

Spirit Airlines

Sat, Aug 15

4h 28m

$37

Based on null reviews

Spirit Airlines

Wed, Aug 12

4h 28m

$38

Based on null reviews

Multiple Airlines

Tue, Jul 14

27h 30m

$88

Based on null reviews

Sun Country Air

Wed, Jul 15

19h 11m

$115

Based on null reviews

Delta

Sat, Aug 1

8h 00m

$64

Based on null reviews

Spirit Airlines

Thu, Aug 6

16h 11m

$65

Based on null reviews

Multiple Airlines

Sun, Aug 9

12h 09m

$89

Based on null reviews

Delta

Sat, Jul 4

4h 24m

$81

Based on null reviews

Spirit Airlines

Thu, Aug 20

16h 11m

$69

Based on null reviews

Multiple Airlines

Tue, Aug 18

12h 43m

$90

Based on null reviews

Spirit Airlines

Tue, Aug 18

16h 11m

$70

Based on null reviews

Delta

Tue, Jul 14

5h 40m

$85

Based on null reviews

Delta

Mon, Sep 7

6h 30m

$85

Based on null reviews

Spirit Airlines

Thu, Aug 20

4h 28m

$72

Based on null reviews

Multiple Airlines

Sat, Jul 25

22h 41m

$101

Based on null reviews

Spirit Airlines

Tue, Aug 18

4h 28m

$73

Based on null reviews

Multiple Airlines

Mon, Jul 13

27h 30m

$102

Based on null reviews

Delta

Wed, Jul 29

6h 14m

$94

Based on null reviews

Flights to Seattle/Tacoma Airport

Destination:

Seattle/Tacoma Airport (SEA) United States

Return flight deals:

Seattle/Tacoma Airport - Illinois

Cabin classes:

$963

First

Business

$287

Prem Econ

$41

Economy

Browse origins:

$218

Bloomington

$298

Champaign

$86

Chicago

$548

Decatur

$211

Moline

$204

Peoria

$435

Quincy

$225

Springfield

Browse destinations:

$86

Seattle/Tacoma Airport

Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an email and someone from our team will get back to you promptly.

SEA

Find cheap flights from Illinois to Seattle/Tacoma Airport

Good to know

Low season

High season

Average price of a round-trip

Good deal for a round-trip

FAQs for booking Illinois to Seattle/Tacoma Airport flights

How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?

Top 3 airlines serving Illinois to Seattle/Tacoma Intl

Book cheap flights from Illinois to Seattle/Tacoma Airport (round-trip)

Book cheap flights from Illinois to Seattle/Tacoma Airport (one-way)

Flights to Seattle/Tacoma Airport

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