$139 Cheap Flights from St. Louis (STL) to Eugene (EUG)

View $139 flight on Tue, Apr 21, 2026Opens 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 $139 for one-way flights and $277 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, May 13 - Tue, May 19
STL
St. Louis
EUG
Eugene
$277 Roundtrip, found 17 hours ago
$277
Roundtrip
found 17 hours ago
Select Delta flight, departing Wed, May 13 from St. Louis to Eugene, returning Tue, May 19, priced at $277 found 17 hours ago
United
Wed, May 13 - Tue, May 19
STL
St. Louis
EUG
Eugene
$277 Roundtrip, found 17 hours ago
$277
Roundtrip
found 17 hours ago
Select United flight, departing Wed, May 13 from St. Louis to Eugene, returning Tue, May 19, priced at $277 found 17 hours ago
Hawaiian Airlines
Tue, Mar 24 - Wed, Apr 8
STL
St. Louis
EUG
Eugene
$277 Roundtrip, found 4 days ago
$277
Roundtrip
found 4 days ago
Select Hawaiian Airlines flight, departing Tue, Mar 24 from St. Louis to Eugene, returning Wed, Apr 8, priced at $277 found 4 days ago
Alaska Airlines
Wed, May 13 - Tue, May 19
STL
St. Louis
EUG
Eugene
$277 Roundtrip, found 17 hours ago
$277
Roundtrip
found 17 hours ago
Select Alaska Airlines flight, departing Wed, May 13 from St. Louis to Eugene, returning Tue, May 19, priced at $277 found 17 hours ago
Southwest Airlines
Tue, Apr 21 - Sat, Apr 25
STL
St. Louis
EUG
Eugene
$279 Roundtrip, found 5 days ago
$279
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Tue, Apr 21 from St. Louis to Eugene, returning Sat, Apr 25, priced at $279 found 5 days ago
Alaska Airlines
Tue, Apr 21 - Sat, Apr 25
STL
St. Louis
EUG
Eugene
$288 Roundtrip, found 5 days ago
$288
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Apr 21 from St. Louis to Eugene, returning Sat, Apr 25, priced at $288 found 5 days ago
Hawaiian Airlines
Wed, Mar 25 - Wed, Apr 8
STL
St. Louis
EUG
Eugene
$290 Roundtrip, found 4 days ago
$290
Roundtrip
found 4 days ago
Select Hawaiian Airlines flight, departing Wed, Mar 25 from St. Louis to Eugene, returning Wed, Apr 8, priced at $290 found 4 days ago
Alaska Airlines
Wed, Mar 25 - Tue, Mar 31
STL
St. Louis
EUG
Eugene
$295 Roundtrip, found 5 days ago
$295
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Wed, Mar 25 from St. Louis to Eugene, returning Tue, Mar 31, priced at $295 found 5 days ago
Southwest Airlines
Wed, Apr 29 - Wed, May 6
STL
St. Louis
EUG
Eugene
$297 Roundtrip, found 4 days ago
$297
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Wed, Apr 29 from St. Louis to Eugene, returning Wed, May 6, priced at $297 found 4 days ago
Alaska Airlines
Wed, May 13 - Tue, May 19
STL
St. Louis
EUG
Eugene
$300 Roundtrip, found 17 hours ago
$300
Roundtrip
found 17 hours ago
Select Alaska Airlines flight, departing Wed, May 13 from St. Louis to Eugene, returning Tue, May 19, priced at $300 found 17 hours ago

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Alternative airports near Eugene

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Mahlon Sweet Field EUG. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $422
EUG
Mahlon Sweet Field
CheapestClosest
Average driving time to city center14 min
Flights from $422

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 $139 or cheap return flight from $277 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 May, 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.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Eugene
Airlines serving
Alaska Airlines, American Airlines, Delta, Southwest Airlines, United
Roundtrip price
$276
Distance
1729 mi

Book with confidence

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 May. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $139 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.

 

St. Louis to Eugene Flights

*Flight schedules are subject to change.

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