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$126+ Cheap flights from Peoria, IL to Seattle (PIA - SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
PIA — SEA
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheap flight deals from Peoria to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Peoria (PIA) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 29, 2025.

Round-trip from

$251
(American Airlines)

One-way from

$126
(American Airlines)

Popular in

January

Cheapest in

April

Average price

$562
From Greater Peoria to Seattle/Tacoma Intl
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One-way flight from Greater Peoria to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 8% potential increase in price ($53 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Peoria to Seattle

Cheapest flights from Peoria to Seattle
Explore the most affordable flight options available from Peoria to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This American Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/217:00 amPIA - SEA
1 stop7h 47mAmerican Airlines
Fri 10/2412:34 amSEA - PIA
1 stop6h 53mAmerican Airlines
Deal found 7/27$251
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/165:19 pmPIA - SEA
1 stop7h 01mUnited Airlines
Wed 9/2411:11 amSEA - PIA
2 stops9h 04mUnited Airlines
Deal found 7/28$256

Cheapflights Fare Finder

 
Customize your flight search to find flights from Peoria to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
Use the filters below to find and compare flights from Peoria to Seattle that are best for you.

Fly from

Peoria

Fly to

Seattle

Route

Depart

Return

Price

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Tue 10/21

11:16 am-4:54 pm

1 stop7h 38m

Seattle/Tacoma Intl

Sat 10/25

11:42 am-11:15 pm

1 stop9h 33m

$251

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Tue 9/16

5:19 pm-10:20 pm

1 stop7h 01m

Seattle/Tacoma Intl

Wed 9/24

11:11 am-10:15 pm

2 stops9h 04m

$256

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Tue 8/19

6:39 pm-11:41 pm

1 stop7h 02m

$126

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Sat 8/23

3:55 pm-10:20 pm

1 stop8h 25m

$171

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Fri 8/15

12:37 pm-4:56 pm

2 stops30h 19m

$286

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Best time to book a flight from Peoria to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Peoria with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Peoria to Seattle

What is the cheapest month to book a flight from Peoria, Illinois to Seattle?

Currently, January is the cheapest month in which you can book a flight from Peoria, Illinois to Seattle (average of $238). Flying from Peoria, Illinois to Seattle in June is currently the most expensive (average of $389). 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.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated July 29, 2025.
Get a feel of what it's like to fly with United Airlines and American Airlines from Peoria to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,899 reviews

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,899 reviews
United Airlines
7.4
Good
8,899 reviews

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,899 reviews

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Peoria to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Peoria, Illinois to Seattle round-trip?

    Currently priced at $251, American Airlines will fly you from Peoria, Illinois to Seattle and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on United Airlines for as low as $256. American Airlines is currently priced 54% below the average price you’ll pay for this route.

  • Can I find deals for flights from Peoria to Seattle that include hotel bookings?

    Yes. In addition to deals on Peoria to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Peoria to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Peoria to Seattle.

  • Can I find deals for business class flights from Peoria to Seattle?

    Yes. Cheapflights offers flight deals from Peoria to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Peoria, Illinois to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Peoria, Illinois to Seattle (average of $238). Flying from Peoria, Illinois to Seattle in June is currently the most expensive (average of $389). 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.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Ocean Shores
Lakewood
Lynnwood
Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
Chehalis
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Issaquah
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Shoreline
Federal Way
Shelton

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Top 2 airlines flying from Peoria to Seattle

Discover the top 2 airlines that operate flights from Peoria to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$546FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$303Average$531FlexibilityNo cancel feeOn-time69%

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