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Harlingen

$99+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HRL
Apr 1 — Apr 81
Wed 4/1
Wed 4/8
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 March 2, 2026.

This Southwest deal was found by Cheapflights users on 3/1. 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.
Wed 5/134:25 pm
STL
-
HRL
1 stop5h 35m
Southwest
Wed 5/2010:45 am
HRL
-
STL
1 stop4h 05m
Southwest
Deal found 3/1$197
This Southwest deal was found by Cheapflights users on 2/26. 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.
Wed 4/811:30 am
MCI
-
HRL
1 stop4h 30m
Southwest
Tue 4/144:40 pm
HRL
-
MCI
1 stop6h 15m
Southwest
Deal found 2/26$206
This United Airlines deal was found by Cheapflights users on 2/28. 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 5/58:49 am
MCI
-
HRL
2 stops11h 11m
United Airlines
Tue 5/127:00 am
HRL
-
MCI
1 stop5h 08m
United Airlines
Deal found 2/28$222
This American Airlines deal was found by Cheapflights users on 2/26. 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.
Wed 4/85:30 am
MCI
-
HRL
1 stop4h 47m
American Airlines
Tue 4/146:00 am
HRL
-
MCI
1 stop4h 15m
American Airlines
Deal found 2/26$230
This American Airlines deal was found by Cheapflights users on 2/28. 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 5/55:30 am
MCI
-
HRL
1 stop4h 47m
American Airlines
Tue 5/126:00 am
HRL
-
MCI
1 stop4h 15m
American Airlines
Deal found 2/28$234
This American Airlines deal was found by Cheapflights users on 3/1. 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.
Sun 4/55:30 am
MCI
-
HRL
1 stop4h 42m
American Airlines
Wed 4/88:03 pm
HRL
-
MCI
1 stop4h 04m
American Airlines
Deal found 3/1$236
This American Airlines deal was found by Cheapflights users on 2/27. 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 3/275:30 am
MCI
-
HRL
1 stop4h 42m
American Airlines
Wed 4/18:06 pm
HRL
-
MCI
1 stop4h 06m
American Airlines
Deal found 2/27$263
This American Airlines deal was found by Cheapflights users on 2/26. 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.
Thu 4/95:30 am
MCI
-
HRL
1 stop4h 47m
American Airlines
Mon 4/137:53 pm
HRL
-
MCI
1 stop4h 14m
American Airlines
Deal found 2/26$265
This Southwest deal was found by Cheapflights users on 2/27. 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.
Wed 3/184:05 pm
STL
-
HRL
1 stop5h 20m
Southwest
Wed 3/255:05 pm
HRL
-
STL
1 stop5h 45m
Southwest
Deal found 2/27$302
This American Airlines deal was found by Cheapflights users on 2/27. 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.
Sat 2/285:12 am
STL
-
HRL
1 stop5h 00m
American Airlines
Tue 3/106:46 pm
HRL
-
STL
1 stop4h 36m
American Airlines
Deal found 2/27$330
This United Airlines deal was found by Cheapflights users on 2/28. 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.
Wed 10/288:50 am
STL
-
HRL
1 stop6h 44m
United Airlines
Sat 10/315:15 am
HRL
-
STL
1 stop4h 27m
United Airlines
Deal found 2/28$338
This Southwest deal was found by Cheapflights users on 2/28. 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 5/154:30 pm
STL
-
HRL
2 stops6h 30m
Southwest
Fri 5/226:00 pm
HRL
-
STL
2 stops6h 15m
Southwest
Deal found 2/28$348

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 March 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$197
(Southwest)

One-way from

$99
(American Airlines)

Popular in

December

Cheapest in

May

Average price

$417
Provider with most accurate pricing for Lambert-St Louis-Harlingen Valley Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Harlingen Valley Intl flights.
Search Deals
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. 18% potential increase in price ($71 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 2, 2026.
Use the filters below to find and compare flights from Missouri to Harlingen that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Wed 5/13

4:25 pm-10:00 pm

1 stop5h 35m

Harlingen Valley Intl

Wed 5/20

10:45 am-2:50 pm

1 stop4h 05m

$197

Kansas CityHarlingen

MCI - HRL

MCIHRL

Kansas City

Wed 4/8

5:30 pm-10:00 pm

1 stop4h 30m

Harlingen Valley Intl

Tue 4/14

7:10 am-2:10 pm

2 stops7h 00m

$212

Kansas CityHarlingen

MCI - HRL

MCIHRL

Kansas City

Thu 4/9

5:20 am-10:05 am

1 stop4h 45m

Harlingen Valley Intl

Mon 4/13

5:00 pm-11:50 pm

1 stop6h 50m

$269

Kansas CityHarlingen

MCI - HRL

MCIHRL

Kansas City

Tue 5/5

2:30 pm-10:00 pm

2 stops7h 30m

Harlingen Valley Intl

Tue 5/12

7:10 am-2:10 pm

2 stops7h 00m

$283

Kansas CityHarlingen

MCI - HRL

MCIHRL

Kansas City

Tue 4/7

6:30 am-11:23 am

1 stop4h 53m

Harlingen Valley Intl

Tue 4/14

5:18 pm-10:29 pm

1 stop5h 11m

$287

Kansas CityHarlingen

MCI - HRL

MCIHRL

Kansas City

Wed 4/8

4:29 pm-9:59 pm

1 stop5h 30m

Harlingen Valley Intl

Wed 4/15

5:18 pm-10:30 pm

1 stop5h 12m

$287

Kansas CityHarlingen

MCI - HRL

MCIHRL

Kansas City

Wed 4/8

3:00 pm-7:40 pm

1 stop4h 40m

Harlingen Valley Intl

Tue 4/14

12:05 pm-4:44 pm

1 stop4h 39m

$287

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Wed 3/18

8:40 am-4:10 pm

2 stops7h 30m

Harlingen Valley Intl

Wed 3/25

6:05 am-12:40 pm

1 stop6h 35m

$322

Kansas CityHarlingen

MCI - HRL

MCIHRL

Kansas City

Sun 3/29

5:20 am-11:20 am

2 stops6h 00m

Harlingen Valley Intl

Sun 4/5

5:30 am-10:05 am

1 stop4h 35m

$339

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Fri 5/15

4:30 pm-11:00 pm

2 stops6h 30m

Harlingen Valley Intl

Fri 5/22

6:00 pm-12:15 am

2 stops6h 15m

$348

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/1

Showing 1-10 of 24 resultsSorted by cheapest first
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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 June is currently the most expensive (average of $290). 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.

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 Southwest and United Airlines fly from Missouri to Harlingen, Texas in about 4h 53m. The time it takes to get you to your destination can typically vary by up to 42m. 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 June is currently the most expensive (average of $290). 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 3 airlines flying from Missouri to Harlingen

Discover the top 3 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 March 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$196Average$325FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$221Average$388FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$248Average$338FlexibilityNo cancel feeOn-time69%

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