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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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
PIA — SEA
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap 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 December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/9. 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 12/233:30 pmPIA - SEA
1 stop9h 17mUnited Airlines
Thu 1/17:00 amSEA - PIA
1 stop7h 43mUnited Airlines
Deal found 12/9$451
This American Airlines deal was found by Cheapflights users on 12/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:00 amPIA - SEA
1 stop9h 37mAmerican Airlines
Thu 1/112:14 amSEA - PIA
1 stop6h 29mAmerican Airlines
Deal found 12/11$679
This United Airlines deal was found by Cheapflights users on 12/9. 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.
Thu 12/251:20 pmPIA - SEA
1 stop7h 26mUnited Airlines
Fri 1/27:00 amSEA - PIA
1 stop7h 43mUnited Airlines
Deal found 12/9$684

Find 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$251
(United Airlines)

One-way from

$126
(United Airlines)

Popular in

August

Cheapest in

October

Average price

$442
Provider with most accurate pricing for Greater Peoria-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Greater Peoria-Seattle/Tacoma Intl flights.
Search Deals
From Greater Peoria to Seattle/Tacoma Intl
Search Deals
One-way flight from Greater Peoria to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 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

Wed 1/7

10:45 am-6:14 pm

1 stop9h 29m

Seattle/Tacoma Intl

Wed 1/14

12:25 pm-8:47 pm

1 stop6h 22m

$251

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Sat 2/14

2:51 pm-10:43 pm

1 stop9h 52m

Seattle/Tacoma Intl

Wed 2/18

7:00 am-4:50 pm

1 stop7h 50m

$341

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Wed 1/28

10:45 am-6:14 pm

1 stop9h 29m

$126

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Wed 1/28

7:39 am-1:08 pm

1 stop7h 29m

$126

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Mon 12/29

5:03 pm-10:11 am

1 stop19h 08m

$379

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Tue 12/30

4:20 pm-11:08 pm

1 stop8h 48m

$544

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Tue 12/30

5:49 pm-12:30 pm

3 stops44h 41m

$558

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Tue 12/30

5:19 pm-9:56 am

2 stops18h 37m

$573

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Sun 12/28

8:48 pm-10:11 am

2 stops39h 23m

$617

PeoriaSeattle

PIA - SEA

PIASEA

Greater Peoria

Mon 12/29

5:00 am-12:37 pm

1 stop9h 37m

$630

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Compare providers for flights from Peoria to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Peoria to Seattle in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Peoria, Illinois-Seattle flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Peoria, Illinois-Seattle flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Peoria, Illinois-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Peoria, Illinois-Seattle flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Peoria, Illinois-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, April is the cheapest month in which you can book a flight from Peoria, Illinois to Seattle (average of $228). Flying from Peoria, Illinois to Seattle in June is currently the most expensive (average of $403). 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 December 12, 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
9,095 reviews

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,095 reviews
United Airlines
7.4
Good
9,095 reviews

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
American Airlines
7.2
Good
11,050 reviews
United Airlines
7.4
Good
9,095 reviews

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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.

  • How long is the flight from Peoria, Illinois to Seattle?

    Airlines like United Airlines fly from Peoria, Illinois to Seattle in about 9h 29m. The time it takes to get you to your destination can typically vary by up to . The distance from Peoria, Illinois to Seattle is about 1671 mi.

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

    Currently priced at $269, United Airlines will fly you from Peoria, Illinois to Seattle and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on American Airlines for as low as $288. United Airlines is currently priced 43% 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, April is the cheapest month in which you can book a flight from Peoria, Illinois to Seattle (average of $228). Flying from Peoria, Illinois to Seattle in June is currently the most expensive (average of $403). 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
Tacoma
SeaTac
Lakewood
Olympia
Ocean Shores
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Tukwila
Kent
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

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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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$269Average$471FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$538FlexibilityNo cancel feeOn-time71%

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