$159 Cheap Flights from St. Louis (STL) to Eureka (ACV)

View $159 flight on Tue, Apr 21, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Eureka, CA (ACV-Arcata - Eureka)

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Cheap Flights from St. Louis to Eureka (STL-ACV)

Prices were available within the past 7 days and start at $159 for one-way flights and $312 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, Apr 21 - Tue, Apr 28
STL
St. Louis
ACV
Eureka
$312 Roundtrip, found 15 hours ago
$312
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Tue, Apr 21 from St. Louis to Eureka, returning Tue, Apr 28, priced at $312 found 15 hours ago
United
Wed, May 6 - Tue, May 12
STL
St. Louis
ACV
Eureka
$319 Roundtrip, found 2 days ago
$319
Roundtrip
found 2 days ago
Select United flight, departing Wed, May 6 from St. Louis to Eureka, returning Tue, May 12, priced at $319 found 2 days ago
United
Wed, May 6 - Tue, May 12
STL
St. Louis
ACV
Eureka
$343 Roundtrip, found 2 days ago
$343
Roundtrip
found 2 days ago
Select United flight, departing Wed, May 6 from St. Louis to Eureka, returning Tue, May 12, priced at $343 found 2 days ago
Alaska Airlines
Wed, Apr 22 - Wed, Apr 29
STL
St. Louis
ACV
Eureka
$352 Roundtrip, found 5 days ago
$352
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Wed, Apr 22 from St. Louis to Eureka, returning Wed, Apr 29, priced at $352 found 5 days ago
United
Tue, May 5 - Thu, May 14
STL
St. Louis
ACV
Eureka
$357 Roundtrip, found 1 day ago
$357
Roundtrip
found 1 day ago
Select United flight, departing Tue, May 5 from St. Louis to Eureka, returning Thu, May 14, priced at $357 found 1 day ago
United
Tue, Apr 21 - Tue, Apr 28
STL
St. Louis
ACV
Eureka
$367 Roundtrip, found 4 days ago
$367
Roundtrip
found 4 days ago
Select United flight, departing Tue, Apr 21 from St. Louis to Eureka, returning Tue, Apr 28, priced at $367 found 4 days ago
United
Tue, Apr 21 - Tue, Apr 28
STL
St. Louis
ACV
Eureka
$384 Roundtrip, found 4 days ago
$384
Roundtrip
found 4 days ago
Select United flight, departing Tue, Apr 21 from St. Louis to Eureka, returning Tue, Apr 28, priced at $384 found 4 days ago
United
Wed, May 27 - Tue, Jun 2
STL
St. Louis
ACV
Eureka
$394 Roundtrip, found 3 days ago
$394
Roundtrip
found 3 days ago
Select United flight, departing Wed, May 27 from St. Louis to Eureka, returning Tue, Jun 2, priced at $394 found 3 days ago
United
Tue, May 5 - Thu, May 14
STL
St. Louis
ACV
Eureka
$398 Roundtrip, found 1 day ago
$398
Roundtrip
found 1 day ago
Select United flight, departing Tue, May 5 from St. Louis to Eureka, returning Thu, May 14, priced at $398 found 1 day ago
United
Wed, Sep 2 - Tue, Sep 8
STL
St. Louis
ACV
Eureka
$398 Roundtrip, found 2 days ago
$398
Roundtrip
found 2 days ago
Select United flight, departing Wed, Sep 2 from St. Louis to Eureka, returning Tue, Sep 8, priced at $398 found 2 days ago

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Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Arcata - Eureka Airport (ACV) cost?
Secure a cheap one-way flight from $159 or cheap return flight from $312 from Lambert-St. Louis Intl. Airport (STL) to Arcata - Eureka Airport (ACV) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Arcata - Eureka Airport (ACV)?
The cheapest month to fly from STL to ACV is April, when there's less demand. Off-peak season is generally when airlines offer better prices between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Arcata - Eureka Airport (ACV)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll fly you from STL to ACV. Then, sort your results by "Price (lowest to highest)" to snap up a good deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Arcata - Eureka Airport (ACV)?
There aren't any daily direct flights departing from Lambert-St. Louis Intl. Airport (STL) to Arcata - Eureka Airport (ACV). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from STL to ACV?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change 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 Lambert-St. Louis Intl. Airport (STL) to Arcata - Eureka Airport (ACV)?
To arrive at Arcata - Eureka Airport (ACV) on schedule, select a flight that takes off from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Arcata - Eureka Airport (ACV) last-minute?
Booking your plane ticket from STL to ACV shortly before your getaway is usually more expensive. But if you're flexible with your schedule, you could bag a cheap last-minute fare.
Is it cheaper to book a STL to ACV flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to ACV flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one place takes the hassle out of planning your trip. Just secure your flights and select from our wide range of stays, then tailor your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Arcata - Eureka Airport (ACV)?
If you booked your STL to ACV flight in the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you want more information.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Arcata - Eureka
Airlines serving
Alaska Airlines, United
Roundtrip price
$308
Distance
1785 mi

Book with confidence

St. Louis to Eureka Flights

The cheapest times to fly from St. Louis to Eureka

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

 

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

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

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 Eureka in 2026. You can also book with separate airlines for your outbound and return journeys, from $159 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 Eureka 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 Eureka 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 Eureka Flights

*Flight schedules are subject to change.

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*Available to One Key members.