$169 Cheap Flights from St. Louis (STL) to Eugene (EUG)

View $169 flight on Wed, Nov 5, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Mahlon Sweet Field Airport (EUG)

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Cheap Flights from St. Louis to Eugene (STL-EUG)

Prices were available within the past 7 days and start at $169 for one-way flights and $294 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Nov 6 - Mon, Nov 10
STL
St. Louis
EUG
Eugene
$294 Roundtrip, found 5 days ago
$294
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Nov 6 from St. Louis to Eugene, returning Mon, Nov 10, priced at $294 found 5 days ago
Delta
Tue, Nov 4 - Sat, Nov 8
STL
St. Louis
EUG
Eugene
$314 Roundtrip, found 20 hours ago
$314
Roundtrip
found 20 hours ago
Select Delta flight, departing Tue, Nov 4 from St. Louis to Eugene, returning Sat, Nov 8, priced at $314 found 20 hours ago
Delta
Tue, Nov 4 - Fri, Nov 7
STL
St. Louis
EUG
Eugene
$316 Roundtrip, found 5 days ago
$316
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Nov 4 from St. Louis to Eugene, returning Fri, Nov 7, priced at $316 found 5 days ago
Delta
Thu, Nov 6 - Fri, Nov 7
STL
St. Louis
EUG
Eugene
$322 Roundtrip, found 5 days ago
$322
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Nov 6 from St. Louis to Eugene, returning Fri, Nov 7, priced at $322 found 5 days ago
Delta
Wed, Oct 22 - Tue, Nov 11
STL
St. Louis
EUG
Eugene
$325 Roundtrip, found 3 days ago
$325
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Oct 22 from St. Louis to Eugene, returning Tue, Nov 11, priced at $325 found 3 days ago
Delta
Fri, Nov 7 - Sat, Nov 8
STL
St. Louis
EUG
Eugene
$327 Roundtrip, found 5 days ago
$327
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Nov 7 from St. Louis to Eugene, returning Sat, Nov 8, priced at $327 found 5 days ago
Alaska Airlines
Wed, Oct 15 - Tue, Oct 21
STL
St. Louis
EUG
Eugene
$336 Roundtrip, found 4 days ago
$336
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed, Oct 15 from St. Louis to Eugene, returning Tue, Oct 21, priced at $336 found 4 days ago
United
Tue, Nov 4 - Tue, Nov 18
STL
St. Louis
EUG
Eugene
$337 Roundtrip, found 3 days ago
$337
Roundtrip
found 3 days ago
Select United flight, departing Tue, Nov 4 from St. Louis to Eugene, returning Tue, Nov 18, priced at $337 found 3 days ago
Southwest Airlines
Tue, Nov 4 - Tue, Nov 18
STL
St. Louis
EUG
Eugene
$337 Roundtrip, found 3 days ago
$337
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Tue, Nov 4 from St. Louis to Eugene, returning Tue, Nov 18, priced at $337 found 3 days ago
Hawaiian Airlines
Wed, Oct 15 - Sat, Oct 18
STL
St. Louis
EUG
Eugene
$345 Roundtrip, found 1 day ago
$345
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Wed, Oct 15 from St. Louis to Eugene, returning Sat, Oct 18, priced at $345 found 1 day ago

Find the cheapest month to fly from St. Louis (STL) to Eugene (EUG)

August is typically the cheapest month to fly

From $222 - $609 per traveler.
Flights from St. Louis (STL) to Eugene (EUG)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Eugene
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$293
Distance
1729 mi

St. Louis to Eugene Flights

The cheapest times to fly from St. Louis to Eugene

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 St. Louis to Eugene are during the month of November. You can find some of the cheapest flights from St. Louis to Eugene with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Eugene

Sunday is one of the best days to book for cheap flights from St. Louis to Eugene: 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 St. Louis to Eugene

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 St. Louis to Eugene in 2025. You can also book with separate airlines for your outbound and return journeys, from $169 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 St. Louis to Eugene 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 St. Louis to Eugene 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 Lambert-St. Louis Intl. Airport (STL) to Mahlon Sweet Field Airport (EUG) cost?
Secure a cheap one-way flight from $169 or cheap return flight from $294 from Lambert-St. Louis Intl. Airport (STL) to Mahlon Sweet Field Airport (EUG) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Mahlon Sweet Field Airport (EUG)?
The cheapest month to fly from STL to EUG is November, when demand is low. Off-peak season is typically when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Mahlon Sweet Field Airport (EUG)?
To find the cheapest airline that'll fly you from STL to EUG, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Mahlon Sweet Field Airport (EUG)?
Direct flights from Lambert-St. Louis Intl. Airport (STL) to Mahlon Sweet Field Airport (EUG) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to EUG?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on various factors, such as the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Mahlon Sweet Field Airport (EUG)?
To arrive at Mahlon Sweet Field Airport (EUG) on time, pick a flight that leaves Lambert-St. Louis Intl. Airport (STL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 Lambert-St. Louis Intl. Airport (STL) to Mahlon Sweet Field Airport (EUG) last-minute?
Booking your ticket from STL to EUG right before your getaway is usually more expensive. But if there's some wiggle room with your travel times and dates, you could grab a cheap last-minute fare.
Is it cheaper to book a STL to EUG flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to EUG flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one easy place will take the stress out of planning your trip. Simply secure your flights and choose from our extensive range of hotels, then customize your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Mahlon Sweet Field Airport (EUG)?
In most instances, you can reschedule or cancel your STL to EUG flight. However, additional charges may apply, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you'd like further details, head to our Customer Service portal.

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*Available to One Key members.