What are the cheapest airlines flying from St. Louis to Harlingen, Texas round-trip?

Southwest, at $293, was found to be the cheapest airline from St. Louis to Harlingen, Texas.Alternate airlines to your destination round-trip include American Airlines and United Airlines. Southwest is 19% cheaper than the average price of flights available within the next 90 days to this destination.

What is the cheapest day to fly from St. Louis to Harlingen, Texas?

Travelers seeking maximum savings on their St. Louis to Harlingen, Texas flight should consider departing on Monday mornings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular airlines that fly from St. Louis to Harlingen, Texas?

When booking a flight from St. Louis to Harlingen, Texas, you may want to consider flying on American Airlines, Delta or United Airlines as they are the most popular for this route.

What is the cheapest day to fly round-trip from St. Louis to Harlingen, Texas?

Departing on a Sunday is a good option for securing a great price. You can expect to save up to 45% when planning your travel around this day of the week.

What is the cheapest month to fly from St. Louis to Harlingen, Texas?

Flights from St. Louis to Harlingen, Texas lean towards being more expensive in July. Prices are generally better when you fly from St. Louis to Harlingen, Texas in April, with the cheapest ticket starting at $215.

Most accurate provider : When it comes to deals on St. Louis-Harlingen, Texas flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Harlingen, Texas flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Harlingen, Texas flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Harlingen, Texas flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Harlingen, Texas flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from St. Louis to Harlingen that include hotel bookings?

Yes. In addition to deals on St. Louis to Harlingen flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Harlingen?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Harlingen.

Can I find deals for business class flights from St. Louis to Harlingen?

Yes. Cheapflights offers flight deals from St. Louis to Harlingen by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$104+ Flights from St. Louis to Harlingen, TX

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Cheap flight deals from St. Louis to Harlingen

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$293 (Southwest)
One-way from	$104 (Southwest)
Popular in	July
Cheapest in	April
Average price	$289

Provider with most accurate pricing for Lambert-St Louis-Harlingen Valley Intl flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Harlingen Valley Intl flights.

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From Lambert-St Louis to Harlingen Valley Intl

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One-way flight from Lambert-St Louis to Harlingen Valley Intl

Search Deals

Highest demand for flights based on searches. 9% potential increase in price ($37 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).

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Average for round-trip flights in January 2025

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Find flight deals from St. Louis to Harlingen

Cheapest flights from St. Louis to Harlingen
Explore the most affordable flight options available from St. Louis to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 22, 2025.

Fri 2/711:38 amSTL - HRL

1 stop4h 21mAmerican Airlines

Mon 2/104:29 pmHRL - STL

1 stop6h 27mAmerican Airlines

Deal found 1/22

$304

Fri 4/255:15 amSTL - HRL

1 stop8h 35mSouthwest

Mon 4/286:50 pmHRL - STL

1 stop4h 00mSouthwest

Deal found 1/21

$313

Fri 2/77:00 amSTL - HRL

2 stops12h 47mUnited Airlines

Mon 2/105:22 pmHRL - STL

1 stop4h 58mUnited Airlines

Deal found 1/22

$344

Best flights from St. Louis to Harlingen
Discover carefully curated flight deals from St. Louis to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 22, 2025.

Thu 5/225:15 amSTL - HRL

1 stop4h 05mSouthwest

Mon 5/262:45 pmHRL - STL

1 stop8h 05mSouthwest

Deal found 1/22

$293

Fri 2/711:38 amSTL - HRL

1 stop4h 21mAmerican Airlines

Mon 2/104:29 pmHRL - STL

1 stop6h 27mAmerican Airlines

Deal found 1/22

$304

Fri 2/77:00 amSTL - HRL

2 stops12h 47mUnited Airlines

Mon 2/105:22 pmHRL - STL

1 stop4h 58mUnited Airlines

Deal found 1/22

$344

Last-minute flights from St. Louis to Harlingen
Discover last-minute flight deals from St. Louis to Harlingen. Data last updated January 22, 2025 and is based on user searches.

Thu 1/236:00 amSTL - HRL

1 stop7h 51mDelta

Mon 1/272:46 pmHRL - STL

1 stop8h 28mDelta

Deal found 1/20

$399

Thu 1/235:40 amSTL - HRL

2 stops10h 19mAmerican Airlines

Mon 1/275:44 amHRL - STL

1 stop7h 16mAmerican Airlines

Deal found 1/21

$439

Thu 1/236:30 amSTL - HRL

2 stops9h 37mUnited Airlines

Mon 1/275:22 pmHRL - STL

1 stop4h 58mUnited Airlines

Deal found 1/20

$582

Fri 1/314:36 pmSTL - HRL

1 stop7h 00mUnited Airlines

Sun 2/25:22 pmHRL - STL

1 stop4h 58mUnited Airlines

Deal found 1/21

$647

One-way flights from St. Louis to Harlingen
Search for one-way flight options from St. Louis to Harlingen. Find affordable one-way fares based on user searches. Data last updated January 22, 2025.

Wed 2/1911:05 amSTL - HRL

2 stops5h 35mSouthwest

Deal found 1/22

$104

Find flights from St. Louis to Harlingen within your budget

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Wed 7/2

9:46 am-4:10 pm

1 stop6h 24m

Harlingen Valley Intl

Tue 7/8

2:47 pm-8:19 pm

1 stop5h 32m

$304

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Fri 4/25

5:15 am-1:50 pm

1 stop8h 35m

Harlingen Valley Intl

Mon 4/28

6:50 pm-10:50 pm

1 stop4h 00m

$313

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Fri 3/7

8:40 am-4:04 pm

1 stop7h 24m

Harlingen Valley Intl

Fri 3/14

4:55 pm-10:15 pm

1 stop5h 20m

$425

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Fri 3/7

6:00 am-2:48 pm

1 stop8h 48m

Harlingen Valley Intl

Fri 3/14

2:34 pm-11:03 pm

1 stop8h 29m

$549

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Wed 2/19

7:15 am-4:40 pm

1 stop9h 25m

$104

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/22

Compare providers for flights from St. Louis to Harlingen

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Harlingen in January.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Harlingen, Texas flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Harlingen, Texas flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Harlingen, Texas flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Harlingen, Texas flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Harlingen, Texas flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Harlingen

Have a flexible travel schedule? Discover the best time to fly to Harlingen from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from St. Louis to Harlingen

Get recent, data-driven insights about flights from St. Louis to Harlingen including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from St. Louis to Harlingen, Texas?

Currently, April is the cheapest month in which you can book a flight from St. Louis to Harlingen, Texas (average of $267). Flying from St. Louis to Harlingen, Texas in July is currently the most expensive (average of $420). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to HRL?

Unlike in the morning, when flights are generally more expensive, you can save up to 6% on flights from St. Louis to Harlingen, Texas by exploring options for tickets at noon.

Rainfall in Harlingen by month

In terms of precipitation, rainfall in Harlingen, Texas ranges from 1.1 - 5.2 inches per month. September is typically the wettest month, when rainfall can reach 5.2 in. January is typically the driest time to visit Harlingen, Texas when rainfall is around 1.1 in.

Temperature in Harlingen by month

If weather is an important factor for your trip to Harlingen, Texas, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 60.8 F).

Reviews of airlines servicing Harlingen

Southwest

8.1

Very good

4,654 reviews

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Southwest

8.1

Very good

4,654 reviews

Southwest

8.1

Very good

4,654 reviews

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

United Airlines

7.4

Good

8,975 reviews

Southwest

8.1

Very good

4,654 reviews

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

American Airlines

7.2

Good

10,000 reviews

Southwest

8.1

Very good

4,654 reviews

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Related info for your journey

What are the cheapest airlines flying from St. Louis to Harlingen, Texas round-trip?
Southwest, at $293, was found to be the cheapest airline from St. Louis to Harlingen, Texas.Alternate airlines to your destination round-trip include American Airlines and United Airlines. Southwest is 19% cheaper than the average price of flights available within the next 90 days to this destination.
Can I find deals for flights from St. Louis to Harlingen that include hotel bookings?
Yes. In addition to deals on St. Louis to Harlingen flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Harlingen?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Harlingen.
Can I find deals for business class flights from St. Louis to Harlingen?
Yes. Cheapflights offers flight deals from St. Louis to Harlingen by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Harlingen, Texas?
Currently, April is the cheapest month in which you can book a flight from St. Louis to Harlingen, Texas (average of $267). Flying from St. Louis to Harlingen, Texas in July is currently the most expensive (average of $420). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 4 airlines flying from St. Louis to Harlingen

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$208	Average$327	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$256	Average$397	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$257	Average$421	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$289	Average$397	FlexibilityNo cancel fee	On-time63%

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$104+ Cheap flights from St. Louis to Harlingen, TX (STL - HRL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/19. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Harlingen with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Harlingen

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Harlingen

Cheapest flights from St. Louis to HarlingenExplore the most affordable flight options available from St. Louis to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 22, 2025.

Explore the most affordable flight options available from St. Louis to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 22, 2025.

Find flights from St. Louis to Harlingen within your budget

Compare providers for flights from St. Louis to Harlingen

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Harlingen in January.

Best time to book a flight from St. Louis to Harlingen

Have a flexible travel schedule? Discover the best time to fly to Harlingen from St. Louis with our price prediction graph.

Travel insights for flights from St. Louis to Harlingen

Get recent, data-driven insights about flights from St. Louis to Harlingen including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from St. Louis to Harlingen, Texas?

What is the cheapest time of day to fly from STL to HRL?

Find hourly flight availability from St. Louis to Harlingen. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 22, 2025.

Rainfall in Harlingen by month

Plan your trip to Harlingen by taking into account the average rainfall totals by month.

Temperature in Harlingen by month

Plan your trip to Harlingen by taking into account the average temperature totals by month.

Reviews of airlines servicing Harlingen

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Harlingen. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from St. Louis to Harlingen, Texas round-trip?

Can I find deals for flights from St. Louis to Harlingen that include hotel bookings?

How can I find direct flights from St. Louis to Harlingen?

Can I find deals for business class flights from St. Louis to Harlingen?

What is the cheapest month to book a flight from St. Louis to Harlingen, Texas?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Harlingen

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Top 4 airlines flying from St. Louis to Harlingen

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Cheapest flights from St. Louis to Harlingen
Explore the most affordable flight options available from St. Louis to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 22, 2025.