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Harlingen

$130+ Cheap flights from Missouri to Harlingen, TX (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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
MCI — HRL
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Missouri to Harlingen

Cheapest flights from Missouri to Harlingen
Explore the most affordable flight options available from Missouri to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This Southwest deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/293:00 pmSTL - HRL
1 stop7h 50mSouthwest
Wed 1/1412:15 pmHRL - STL
1 stop4h 15mSouthwest
Deal found 12/13$389
This United Airlines deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/183:00 pmMCI - HRL
1 stop4h 36mUnited Airlines
Mon 12/2212:15 pmHRL - MCI
1 stop4h 39mUnited Airlines
Deal found 12/14$469
This Delta deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/196:40 amMCI - HRL
1 stop7h 40mDelta
Tue 12/233:15 pmHRL - MCI
1 stop7h 56mDelta
Deal found 12/13$471
This Southwest deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:00 pmSTL - HRL
2 stops5h 55mSouthwest
Thu 1/156:35 amHRL - STL
1 stop11h 20mSouthwest
Deal found 12/13$520
This United Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/303:00 pmMCI - HRL
1 stop4h 36mUnited Airlines
Sat 1/35:00 amHRL - MCI
1 stop5h 36mUnited Airlines
Deal found 12/15$539
This American Airlines deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/233:30 pmSTL - HRL
1 stop7h 18mAmerican Airlines
Sun 12/285:34 amHRL - STL
1 stop5h 16mAmerican Airlines
Deal found 12/13$596
This American Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/195:05 amMCI - HRL
1 stop4h 35mAmerican Airlines
Tue 12/2310:12 amHRL - MCI
2 stops12h 05mAmerican Airlines
Deal found 12/15$644
This United Airlines deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/196:00 amMCI - HRL
2 stops13h 36mUnited Airlines
Tue 12/235:00 amHRL - MCI
1 stop5h 36mUnited Airlines
Deal found 12/14$651
This United Airlines deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/294:40 pmMCI - HRL
1 stop5h 19mUnited Airlines
Fri 1/25:00 amHRL - MCI
1 stop5h 36mUnited Airlines
Deal found 12/14$658
This United Airlines deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:40 pmMCI - HRL
1 stop5h 19mUnited Airlines
Sat 12/275:00 amHRL - MCI
1 stop5h 36mUnited Airlines
Deal found 12/14$689
This United Airlines deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:30 amSTL - HRL
2 stops13h 06mUnited Airlines
Sun 12/285:00 amHRL - STL
1 stop4h 49mUnited Airlines
Deal found 12/13$698
This United Airlines deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:45 pmSTL - HRL
1 stop22h 21mUnited Airlines
Fri 1/25:00 amHRL - STL
1 stop4h 49mUnited Airlines
Deal found 12/14$744

Find flight deals from Missouri to Harlingen

Keep the following information in mind while searching for Missouri to Harlingen flight deals. Data was last updated December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$229
(United Airlines)

One-way from

$130
(American Airlines)

Popular in

March

Cheapest in

May

Average price

$421
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 Missouri to Harlingen Valley Intl
Search Deals
One-way flight from Missouri to Harlingen Valley Intl
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Missouri to Harlingen that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 15, 2025.
Use the filters below to find and compare flights from Missouri to Harlingen that are best for you.

Fly from

Missouri

Fly to

Harlingen

Route

Depart

Return

Price

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Sat 1/17

4:42 pm-9:59 pm

1 stop5h 17m

Harlingen Valley Intl

Mon 1/19

5:25 pm-10:00 pm

1 stop4h 35m

$229

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Fri 1/16

6:00 am-11:26 am

1 stop5h 26m

Harlingen Valley Intl

Mon 1/19

5:25 pm-10:00 pm

1 stop4h 35m

$249

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Fri 1/9

6:10 am-2:39 pm

1 stop8h 29m

Harlingen Valley Intl

Fri 1/16

3:39 pm-11:25 pm

1 stop7h 46m

$254

Kansas CityHarlingen

MCI - HRL

MCIHRL

Kansas City

Tue 1/20

6:40 am-11:15 am

1 stop4h 35m

Harlingen Valley Intl

Mon 1/26

6:30 am-11:25 am

1 stop4h 55m

$255

Kansas CityHarlingen

MCI - HRL

MCIHRL

Kansas City

Tue 1/20

6:00 am-6:14 pm

2 stops12h 14m

Harlingen Valley Intl

Mon 1/26

6:44 pm-11:12 pm

1 stop4h 28m

$260

Kansas CityHarlingen

MCI - HRL

MCIHRL

Kansas City

Thu 2/19

5:30 am-10:05 am

1 stop4h 35m

Harlingen Valley Intl

Thu 2/26

8:07 pm-12:07 am

1 stop4h 00m

$261

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Mon 1/5

5:16 am-9:40 am

1 stop4h 24m

Harlingen Valley Intl

Fri 1/9

6:02 am-11:05 am

1 stop5h 03m

$272

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Sun 1/4

7:25 pm-11:55 pm

1 stop4h 30m

Harlingen Valley Intl

Wed 1/21

12:15 pm-4:30 pm

1 stop4h 15m

$285

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Mon 1/5

9:55 am-9:59 pm

2 stops12h 04m

Harlingen Valley Intl

Fri 1/9

5:25 pm-10:00 pm

1 stop4h 35m

$294

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Fri 1/9

9:57 am-9:59 pm

2 stops12h 02m

Harlingen Valley Intl

Fri 1/16

5:25 pm-10:00 pm

1 stop4h 35m

$302

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 20 results
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Best time to book a flight from Missouri to Harlingen

Have a flexible travel schedule? Discover the best time to fly to Harlingen from Missouri 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.

Cheapflights Insights

Everything you need to know about your flight from Missouri to Harlingen

What is the cheapest month to book a flight from Missouri to Harlingen, Texas?

Currently, May is the cheapest month in which you can book a flight from Missouri to Harlingen, Texas (average of $196). Flying from Missouri to Harlingen, Texas in December is currently the most expensive (average of $291). 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 MO to HRL?

Find hourly flight availability from Missouri 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 December 15, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 14% on flights from Missouri to Harlingen, Texas by exploring options for tickets in the afternoon.

Related info for your journey

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

  • What airport do you fly into for flights to Harlingen from Missouri?

    If you book a flight to Harlingen from Missouri, you will be flying to Valley Intl, which is the city’s only airport. Harlingen Valley Intl (HRL) is located 3.7 mi from the center of Harlingen.

  • How long is the flight from Missouri to Harlingen, Texas?

    Airlines like United Airlines, Delta, and Southwest fly from Missouri to Harlingen, Texas in about 4h 35m. The time it takes to get you to your destination can typically vary by up to 3h 54m. Airlines will cover a distance of 918 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Missouri to Harlingen that include hotel bookings?

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

  • How can I find direct flights from Missouri to Harlingen?

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

  • Can I find deals for business class flights from Missouri to Harlingen?

    Yes. Cheapflights offers flight deals from Missouri 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 Missouri to Harlingen, Texas?

    Currently, May is the cheapest month in which you can book a flight from Missouri to Harlingen, Texas (average of $196). Flying from Missouri to Harlingen, Texas in December is currently the most expensive (average of $291). 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

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Alternative routes for Missouri to Harlingen

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Missouri to Harlingen

Discover the top 4 airlines that operate flights from Missouri to Harlingen. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$196Average$338FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$228Average$372FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$248Average$377FlexibilityNo cancel feeOn-time69%
DeltaCheapest$353Average$421FlexibilityNo cancel feeOn-timeN/A

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