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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
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$251
(American Airlines)

One-way from

$126
(American Airlines)

Popular in

January

Cheapest in

April

Average price

$623
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. 4% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/12. 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.
Sat 8/234:15 pmPIA - SEA
1 stop8h 40mAmerican Airlines
Sat 8/305:35 amSEA - PIA
1 stop8h 40mAmerican Airlines
Deal found 6/12$251
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 8/163:39 pmPIA - SEA
2 stops11h 20mUnited Airlines
Wed 8/201:55 pmSEA - PIA
1 stop6h 20mUnited Airlines
Deal found 6/11$256
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/126:22 pmPIA - SEA
3 stops39h 37mMultiple Airlines
Sun 7/205:30 pmSEA - PIA
3 stops19h 28mMultiple Airlines
Deal found 6/10$575

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 June 12, 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

Sat 8/23

4:15 pm-10:55 pm

1 stop8h 40m

Seattle/Tacoma Intl

Sat 8/30

5:35 am-4:15 pm

1 stop8h 40m

$251

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Sat 8/16

3:39 pm-12:59 am

2 stops11h 20m

Seattle/Tacoma Intl

Wed 8/20

1:55 pm-10:15 pm

1 stop6h 20m

$256

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Sat 7/12

6:22 pm-7:59 am

3 stops39h 37m

Seattle/Tacoma Intl

Sun 7/20

5:30 pm-2:58 pm

3 stops19h 28m

$575

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Tue 8/19

6:39 pm-11:40 pm

1 stop7h 01m

$126

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Wed 7/2

10:09 pm-3:03 pm

1 stop18h 54m

$158

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Tue 8/19

8:10 am-8:42 pm

2 stops14h 32m

$176

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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 July is currently the most expensive (average of $391). 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.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 June 12, 2025.
United Airlines
7.4
Good
8,790 reviews

Entertainment

7.0

Crew

8.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

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
8,790 reviews
United Airlines
7.4
Good
8,790 reviews

Entertainment

7.0

Crew

8.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

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
8,790 reviews

Entertainment

7.0

Crew

8.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

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 56% 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 July is currently the most expensive (average of $391). 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 Peoria?

Book flights to Peoria if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Kent
Cle Elum
Centralia
Kirkland
Aberdeen
Renton
Shelton
Silverdale
Issaquah

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Peoria to Seattle

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$313Average$581FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$318Average$550FlexibilityNo cancel feeOn-time69%

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