$104 Cheap United flights St. Louis (STL) to Harlingen (HRL)

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$104 Cheap United flights St. Louis (STL) to Harlingen (HRL)

Prices were available within the past 7 days and start at $104 for one-way flights and $271 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
United
United
United
Flights from St. Louis (STL) to Harlingen (HRL)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Valley Intl.
Airlines serving
American Airlines, Delta, Southwest Airlines, United
Popular airline
American Airlines
Distance
962 mi

Frequently asked questions

How much is a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Valley Intl. Airport (HRL)?
Grab affordable return United Airlines flights from $271 from STL to HRL by organizing your results from "Price (lowest to highest)" on Expedia. Or look for deals from $104 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 STL to HRL with United Airlines?
January is one of the most affordable months to jet away to Harlingen with United Airlines. You could also find excellent prices on one-way and return tickets in September.
What is the cheapest time to book flights from Lambert-St. Louis Intl. Airport (STL) to Valley Intl. Airport (HRL) with United Airlines?
Start searching one to three months ahead of your travel date to find cheaper fares on United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Valley Intl. Airport (HRL). 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 right, and you can enjoy significant savings on domestic journeys.*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 Lambert-St. Louis Intl. Airport (STL) to Valley Intl. Airport (HRL)?
Use our "Nonstop" filter when looking for direct United Airlines flights from STL to HRL. It's also a good way to compare other airlines servicing the same direct trip.
What is the earliest United Airlines flight from STL to HRL?
Find United Airlines's earliest flights from STL to HRL by checking our "Early Morning" and "Morning" filters. Not only will you arrive at your destination sooner, early departures also have a 20% less chance of being canceled.**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 Harlingen?
United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Harlingen arrive at Valley Intl. Airport (HRL). This is the main entry point here.
Why fly with United Airlines from STL to HRL?
With a rewarding loyalty program, United Airlines is a favorite of many passengers flying from STL to HRL. Plus, if you're a United Mileage Plus and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights along with your airline miles.*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 Lambert-St. Louis Intl. Airport (STL) to Valley Intl. Airport (HRL)?
Changes are generally free within 24 hours of booking, but your airline may add a charge after that. For more details about altering your flights, check out your "Trips," select your flight and click on "Manage Booking." If you want the freedom to change your itinerary without extra charges, check the "No cancel fee" or "Changes included" filter when planning your next adventure.

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*Available to One Key members.