$346 Cheap Flights from Springfield (SPI) to Seattle (SEA)

View $346 flight on Tue, Aug 26, 2025Opens in a new window

Popular airlines from Springfield, IL (SPI-Abraham Lincoln Capital) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Springfield to Seattle (SPI-SEA)

Prices were available within the past 7 days and start at $346 for one-way flights and $234 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Oct 15 - Sat, Oct 18
SPI
Springfield
SEA
Seattle
$234 Roundtrip, just found
$234
Roundtrip
just found
Select American Airlines flight, departing Wed, Oct 15 from Springfield to Seattle, returning Sat, Oct 18, priced at $234 just found
American Airlines
Tue, Jul 29 - Tue, Aug 19
SPI
Springfield
SEA
Seattle
$239 Roundtrip, found 1 day ago
$239
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Jul 29 from Springfield to Seattle, returning Tue, Aug 19, priced at $239 found 1 day ago
American Airlines
Thu, Aug 21 - Wed, Aug 27
SPI
Springfield
SEA
Seattle
$319 Roundtrip, found 1 day ago
$319
Roundtrip
found 1 day ago
Select American Airlines flight, departing Thu, Aug 21 from Springfield to Seattle, returning Wed, Aug 27, priced at $319 found 1 day ago
American Airlines
Wed, Oct 15 - Sat, Oct 18
SPI
Springfield
SEA
Seattle
$324 Roundtrip, just found
$324
Roundtrip
just found
Select American Airlines flight, departing Wed, Oct 15 from Springfield to Seattle, returning Sat, Oct 18, priced at $324 just found
American Airlines
Tue, Jul 29 - Tue, Aug 19
SPI
Springfield
SEA
Seattle
$329 Roundtrip, found 1 day ago
$329
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Jul 29 from Springfield to Seattle, returning Tue, Aug 19, priced at $329 found 1 day ago
American Airlines
Wed, Oct 15 - Sat, Oct 18
SPI
Springfield
SEA
Seattle
$333 Roundtrip, just found
$333
Roundtrip
just found
Select American Airlines flight, departing Wed, Oct 15 from Springfield to Seattle, returning Sat, Oct 18, priced at $333 just found
American Airlines
Sat, Oct 11 - Mon, Oct 20
SPI
Springfield
SEA
Seattle
$339 Roundtrip, found 1 hour ago
$339
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Sat, Oct 11 from Springfield to Seattle, returning Mon, Oct 20, priced at $339 found 1 hour ago
American Airlines
Thu, Aug 21 - Tue, Aug 26
SPI
Springfield
SEA
Seattle
$343 Roundtrip, found 10 hours ago
$343
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Thu, Aug 21 from Springfield to Seattle, returning Tue, Aug 26, priced at $343 found 10 hours ago
American Airlines
Thu, Aug 21 - Tue, Aug 26
SPI
Springfield
SEA
Seattle
$348 Roundtrip, found 10 hours ago
$348
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Thu, Aug 21 from Springfield to Seattle, returning Tue, Aug 26, priced at $348 found 10 hours ago
American Airlines
Tue, Oct 14 - Fri, Oct 17
SPI
Springfield
SEA
Seattle
$353 Roundtrip, just found
$353
Roundtrip
just found
Select American Airlines flight, departing Tue, Oct 14 from Springfield to Seattle, returning Fri, Oct 17, priced at $353 just found
Flights from Springfield (SPI) to Seattle (SEA)
Origin airport
Abraham Lincoln Capital
Destination airport
Seattle - Tacoma Intl.
Airlines serving
American Airlines
Roundtrip price
$234
Distance
1699 mi

Springfield to Seattle Flights

The cheapest times to fly from Springfield to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Springfield to Seattle are during the month of October. You can find some of the cheapest flights from Springfield to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Springfield to Seattle

Sunday is one of the best days to book for cheap flights from Springfield to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Springfield to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Springfield to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $346 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Springfield to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Springfield to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Abraham Lincoln Capital Airport (SPI) to Seattle - Tacoma Intl. Airport (SEA) cost?
Discover the latest flight deals from SPI to SEA by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SPI to SEA?
The cheapest flights from SPI to SEA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SPI to SEA?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SPI to SEA. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Abraham Lincoln Capital Airport (SPI) to Seattle - Tacoma Intl. Airport (SEA)?
Nonstop flights from Abraham Lincoln Capital Airport (SPI) to Seattle - Tacoma Intl. Airport (SEA) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SPI to SEA?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary depending on various factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Abraham Lincoln Capital Airport (SPI) to Seattle - Tacoma Intl. Airport (SEA)?
Select a flight from Abraham Lincoln Capital Airport (SPI) to Seattle - Tacoma Intl. Airport (SEA) that leaves before 3 PM to reduce the likelihood of delays. Later departures are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Abraham Lincoln Capital Airport (SPI) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Last-minute bookings from SPI to SEA are generally more expensive. For the best rates, start looking for flights well ahead of time. That being said, if you can play around with your travel dates, you may find a cheap ticket right before your trip.
Is it cheaper to book a SPI to SEA flight and hotel package?
Compared with arranging hotels and flights separately, booking a SPI to SEA flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one easy place takes the hassle out of planning your trip. Just pick your flights and select from our wide range of stays, then customize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Abraham Lincoln Capital Airport (SPI) to Seattle - Tacoma Intl. Airport (SEA)?
In most instances, you can cancel or modify your SPI to SEA flight. However, there may be additional charges, especially if you booked over 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you want more details, go to our Customer Service portal.

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*Available to One Key members.