$378 Cheap Flights from Lafayette (LAF) to Seattle (SEA)

View $378 flight on Thu, Jul 10, 2025Opens in a new window

Popular airlines from Lafayette, IN (LAF-Purdue University) to Seattle-Tacoma International Airport (SEA)

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Lafayette to Seattle (LAF-SEA)

Prices were available within the past 7 days and start at $378 for one-way flights and $329 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Oct 16 - Sun, Oct 19
LAF
Lafayette
SEA
Seattle
$329 Roundtrip, found 6 days ago
$329
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 16 from Lafayette to Seattle, returning Sun, Oct 19, priced at $329 found 6 days ago
United
Thu, Oct 16 - Sun, Oct 19
LAF
Lafayette
SEA
Seattle
$340 Roundtrip, found 6 days ago
$340
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 16 from Lafayette to Seattle, returning Sun, Oct 19, priced at $340 found 6 days ago
United
Fri, Sep 12 - Tue, Sep 16
LAF
Lafayette
SEA
Seattle
$374 Roundtrip, found 6 days ago
$374
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 12 from Lafayette to Seattle, returning Tue, Sep 16, priced at $374 found 6 days ago
United
Fri, Sep 12 - Wed, Sep 17
LAF
Lafayette
SEA
Seattle
$384 Roundtrip, found 6 days ago
$384
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 12 from Lafayette to Seattle, returning Wed, Sep 17, priced at $384 found 6 days ago
United
Wed, Sep 10 - Wed, Sep 17
LAF
Lafayette
SEA
Seattle
$389 Roundtrip, found 6 days ago
$389
Roundtrip
found 6 days ago
Select United flight, departing Wed, Sep 10 from Lafayette to Seattle, returning Wed, Sep 17, priced at $389 found 6 days ago
United
Sat, Oct 18 - Tue, Oct 21
LAF
Lafayette
SEA
Seattle
$411 Roundtrip, found 6 days ago
$411
Roundtrip
found 6 days ago
Select United flight, departing Sat, Oct 18 from Lafayette to Seattle, returning Tue, Oct 21, priced at $411 found 6 days ago
United
Thu, Oct 16 - Sun, Oct 19
LAF
Lafayette
SEA
Seattle
$419 Roundtrip, found 6 days ago
$419
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 16 from Lafayette to Seattle, returning Sun, Oct 19, priced at $419 found 6 days ago
United
Tue, Sep 9 - Wed, Sep 17
LAF
Lafayette
SEA
Seattle
$421 Roundtrip, found 6 days ago
$421
Roundtrip
found 6 days ago
Select United flight, departing Tue, Sep 9 from Lafayette to Seattle, returning Wed, Sep 17, priced at $421 found 6 days ago
United
Thu, Oct 16 - Sun, Oct 19
LAF
Lafayette
SEA
Seattle
$424 Roundtrip, found 6 days ago
$424
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 16 from Lafayette to Seattle, returning Sun, Oct 19, priced at $424 found 6 days ago
Southern Airways Express
Tue, Jul 15 - Sat, Jul 19
LAF
Lafayette
SEA
Seattle
$592 Roundtrip, found 4 days ago
$592
Roundtrip
found 4 days ago
Select Southern Airways Express flight, departing Tue, Jul 15 from Lafayette to Seattle, returning Sat, Jul 19, priced at $592 found 4 days ago
Flights from Lafayette (LAF) to Seattle (SEA)
Origin airport
Purdue University
Destination airport
Seattle - Tacoma Intl.
Roundtrip price
$329
Distance
1808 mi

Lafayette to Seattle Flights

The cheapest times to fly from Lafayette 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 Lafayette to Seattle are during the month of October. You can find some of the cheapest flights from Lafayette to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Lafayette to Seattle

Sunday is one of the best days to book for cheap flights from Lafayette 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 Lafayette 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 Lafayette to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $378 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 Lafayette 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 Lafayette 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 Lafayette, IN (LAF-Purdue University) to Seattle - Tacoma Intl. Airport (SEA) cost?
Discover the latest flight deals from LAF 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 LAF to SEA?
The cheapest flights from LAF 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.
Which airlines fly direct from Lafayette, IN (LAF-Purdue University) to Seattle - Tacoma Intl. Airport (SEA)?
Although Lafayette, IN (LAF-Purdue University) has no direct flights to Seattle - Tacoma Intl. Airport (SEA), other airports have nonstop options. Flying from Indianapolis Intl. Airport (IND) will get you to Seattle without any detours.
What is the cheapest airline that flies from LAF to SEA?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from LAF to SEA. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Lafayette, IN (LAF-Purdue University) to Seattle - Tacoma Intl. Airport (SEA)?
You'll have to catch a flight with a layover when traveling from Lafayette, IN (LAF-Purdue University) to Seattle - Tacoma Intl. Airport (SEA). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from LAF to SEA?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lafayette, IN (LAF-Purdue University) to Seattle - Tacoma Intl. Airport (SEA)?
Choose a flight from Lafayette, IN (LAF-Purdue University) to Seattle - Tacoma Intl. Airport (SEA) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this time have a 22% higher chance of being canceled, on average.**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 Lafayette, IN (LAF-Purdue University) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Booking your ticket from LAF to SEA just before your trip is typically more expensive. However, if you're flexible with your departure dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a LAF to SEA flight and hotel package?
You'll generally save money by securing a LAF to SEA flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. Once you've chosen your preferred flights and accommodations, consider adding extras like car rentals, tours and activities.
Can I cancel or change the date of my flight from Lafayette, IN (LAF-Purdue University) to Seattle - Tacoma Intl. Airport (SEA)?
It's generally possible to cancel or reschedule your LAF to SEA flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.