$383 Cheap United flights Eureka (ACV) to St. Louis (STL)

View $383 flight on Wed, Oct 15, 2025Opens in a new window

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$383 Cheap United flights Eureka (ACV) to St. Louis (STL)

Prices were available within the past 7 days and start at $383 for one-way flights and $309 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Jul 18 - Sun, Jul 27
ACV
Eureka
STL
St. Louis
$309 Roundtrip, found 6 days ago
$309
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jul 18 from Eureka to St. Louis, returning Sun, Jul 27, priced at $309 found 6 days ago
United
Wed, Jul 16 - Wed, Jul 23
ACV
Eureka
STL
St. Louis
$325 Roundtrip, found 2 days ago
$325
Roundtrip
found 2 days ago
Select United flight, departing Wed, Jul 16 from Eureka to St. Louis, returning Wed, Jul 23, priced at $325 found 2 days ago
United
Wed, Jul 16 - Wed, Jul 23
ACV
Eureka
STL
St. Louis
$335 Roundtrip, found 2 days ago
$335
Roundtrip
found 2 days ago
Select United flight, departing Wed, Jul 16 from Eureka to St. Louis, returning Wed, Jul 23, priced at $335 found 2 days ago
United
Fri, Oct 31 - Wed, Nov 12
ACV
Eureka
STL
St. Louis
$384 Roundtrip, found 18 hours ago
$384
Roundtrip
found 18 hours ago
Select United flight, departing Fri, Oct 31 from Eureka to St. Louis, returning Wed, Nov 12, priced at $384 found 18 hours ago
United
Wed, Jul 16 - Wed, Jul 23
ACV
Eureka
STL
St. Louis
$389 Roundtrip, found 2 days ago
$389
Roundtrip
found 2 days ago
Select United flight, departing Wed, Jul 16 from Eureka to St. Louis, returning Wed, Jul 23, priced at $389 found 2 days ago
United
Fri, Jul 18 - Sun, Jul 27
ACV
Eureka
STL
St. Louis
$390 Roundtrip, found 6 days ago
$390
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jul 18 from Eureka to St. Louis, returning Sun, Jul 27, priced at $390 found 6 days ago
Flights from Eureka (ACV) to St. Louis (STL)
Origin airport
Arcata - Eureka
Destination airport
Lambert-St. Louis Intl.
Airlines serving
United
Popular airline
United
Distance
1785 mi

Frequently asked questions

How much is a United Airlines flight from Arcata - Eureka Airport (ACV) to Lambert-St. Louis Intl. Airport (STL)?
You'll discover affordable round-trip United Airlines flights from $309 from ACV to STL by sorting your results from "Price (lowest to highest)" on Expedia. Or search for options from $383 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from ACV to STL with United Airlines?
United Airlines flights to St. Louis are usually cheaper in the quieter months of January and February. Whether you're in search of a return or one-way ticket, you could find a better deal then.
What is the cheapest time to book flights from Arcata - Eureka Airport (ACV) to Lambert-St. Louis Intl. Airport (STL) with United Airlines?
Start searching one to three months ahead of your departure date to score cheaper fares on United Airlines flights from Arcata - Eureka Airport (ACV) to Lambert-St. Louis Intl. Airport (STL). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing spot on, and you can enjoy significant savings on domestic trips.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Arcata - Eureka Airport (ACV) to Lambert-St. Louis Intl. Airport (STL)?
Select our "Nonstop" filter when searching for direct United Airlines flights from ACV to STL. You can also compare other carriers servicing the same nonstop trip.
What is the earliest United Airlines flight from ACV to STL?
Filter your results by "Morning" and "Early Morning" to see the earliest departures from ACV to STL. Heading off early means flight cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in St. Louis?
Take a United Airlines flight from Arcata - Eureka Airport (ACV) to St. Louis, and you'll probably arrive at Lambert-St. Louis Intl. Airport (STL). This is the airline's main hub here.
Why fly with United Airlines from ACV to STL?
A rewarding loyalty program and the opportunity to collect points through United Mileage Plus are the start of the reasons to fly from ACV to STL with United Airlines. Plus, when you join our One Key™ program, you can earn OneKeyCash™* alongside any airline loyalty program earnings. It's yours to use wherever your next trip takes you.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Arcata - Eureka Airport (ACV) to Lambert-St. Louis Intl. Airport (STL)?
Depending on your ticket type, a fee is typically charged if you cancel or change your flight more than 24 hours after it has been confirmed. To find flexible plane tickets, select our "No cancel fee" or "Changes included" filter when searching for flights. To learn more about changing or canceling your reservation, visit "Trips," select your flight and click on "Manage Booking."

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