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Cheap flights from Missouri to Harlingen from $212

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to Harlingen departing on 1/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Missouri to Harlingen

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:00 am - 11:26 amSTL-HRL
5h 26m1 stop
United Airlines Logo
5:25 pm - 10:00 pmHRL-STL
4h 35m1 stop
$212United Airlines
Find Deal
Wed, Jan 14 - Tue, Jan 20
United Airlines Logo
8:30 am - 8:01 pmSTL-HRL
11h 31m2 stops
United Airlines Logo
5:25 pm - 10:00 pmHRL-STL
4h 35m1 stop
$217United Airlines
Find Deal
Wed, Jan 14 - Tue, Jan 20
American Airlines Logo
5:38 pm - 11:11 pmMCI-HRL
5h 33m1 stop
American Airlines Logo
5:36 am - 9:55 amHRL-MCI
4h 19m1 stop
$217American Airlines
Find Deal
Tue, Dec 9 - Tue, Dec 16
Southwest Logo
6:00 am - 10:15 amSTL-HRL
4h 15m1 stop
Southwest Logo
12:15 pm - 4:30 pmHRL-STL
4h 15m1 stop
$237Southwest
Find Deal
Thu, Jan 22 - Mon, Jan 26
United Airlines Logo
6:00 am - 11:26 amSTL-HRL
5h 26m1 stop
United Airlines Logo
5:25 pm - 10:00 pmHRL-STL
4h 35m1 stop
$249United Airlines
Find Deal
Tue, Jan 6 - Sun, Jan 11
Southwest Logo
2:55 pm - 10:30 pmSTL-HRL
7h 35m1 stop
Southwest Logo
2:40 pm - 7:40 pmHRL-STL
5h 00m1 stop
$253Southwest
Find Deal
Sun, Dec 7 - Sat, Dec 13
American Airlines Logo
7:00 am - 5:39 pmMCI-HRL
10h 39m2 stops
American Airlines Logo
5:36 am - 1:51 pmHRL-MCI
8h 15m2 stops
$258American Airlines
Find Deal
Tue, Dec 9 - Tue, Dec 16
Delta Logo
6:05 am - 2:20 pmSTL-HRL
8h 15m1 stop
Delta Logo
3:15 pm - 10:16 pmHRL-STL
7h 01m1 stop
$437Delta
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Tue, Dec 23 - Sun, Dec 28
Delta Logo
6:05 am - 2:20 pmSTL-HRL
8h 15m1 stop
Delta Logo
3:15 pm - 10:16 pmHRL-STL
7h 01m1 stop
$473Delta
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Tue, Dec 23 - Sun, Dec 28
Multiple Airlines Logo
9:50 am - 9:22 amSTL-HRL
23h 32m3 stops
Multiple Airlines Logo
11:47 am - 10:56 amHRL-STL
23h 09m3 stops
$831Multiple Airlines
Find Deal
Fri, Dec 19 - Mon, Jan 5

United Airlines flights from Missouri to Harlingen, Texas

Our best United Airlines deals on Missouri to Harlingen, Texas flight tickets
United Airlines
Jan 14
STL6:00 amLambert-St Louis
5h 26m
1 stop
HRL11:26 amHarlingen Valley Intl
Jan 20
HRL5:25 pmHarlingen Valley Intl
4h 35m
1 stop
STL10:00 pmLambert-St Louis
$212
Find similar
United Airlines
Jan 14
STL8:30 amLambert-St Louis
11h 31m
2 stops
HRL8:01 pmHarlingen Valley Intl
Jan 20
HRL5:25 pmHarlingen Valley Intl
4h 35m
1 stop
STL10:00 pmLambert-St Louis
$217
Find similar
United Airlines
Jan 6
STL6:00 amLambert-St Louis
5h 26m
1 stop
HRL11:26 amHarlingen Valley Intl
Jan 11
HRL5:25 pmHarlingen Valley Intl
4h 35m
1 stop
STL10:00 pmLambert-St Louis
$249
Find similar

American Airlines flights from Missouri to Harlingen, Texas

Our best American Airlines deals on Missouri to Harlingen, Texas flight tickets
American Airlines
Dec 9
MCI5:38 pmKansas City
5h 33m
1 stop
HRL11:11 pmHarlingen Valley Intl
Dec 16
HRL5:36 amHarlingen Valley Intl
4h 19m
1 stop
MCI9:55 amKansas City
$217
Find similar
American Airlines
Dec 9
MCI7:00 amKansas City
10h 39m
2 stops
HRL5:39 pmHarlingen Valley Intl
Dec 16
HRL5:36 amHarlingen Valley Intl
8h 15m
2 stops
MCI1:51 pmKansas City
$258
Find similar
American Airlines
Jan 29
MCI1:56 pmKansas City
4h 18m
1 stop
HRL6:14 pmHarlingen Valley Intl
Feb 1
HRL6:44 pmHarlingen Valley Intl
4h 28m
1 stop
MCI11:12 pmKansas City
$259
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Missouri to Harlingen, Texas 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, momondo users made 832,500 searches. Data last updated November 10, 2025.
Use the filters below to find and compare flights from Missouri to Harlingen, Texas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Wed 1/14

6:00 am-11:26 am

1 stop5h 26m

Harlingen Valley Intl

Tue 1/20

5:25 pm-10:00 pm

1 stop4h 35m

$212

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Wed 1/14

8:30 am-8:01 pm

2 stops11h 31m

Harlingen Valley Intl

Tue 1/20

5:25 pm-10:00 pm

1 stop4h 35m

$217

Kansas CityHarlingen

MCI - HRL

MCIHRL

Kansas City

Tue 12/9

5:38 pm-11:11 pm

1 stop5h 33m

Harlingen Valley Intl

Tue 12/16

5:36 am-9:55 am

1 stop4h 19m

$217

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Thu 1/22

6:00 am-10:15 am

1 stop4h 15m

Harlingen Valley Intl

Mon 1/26

12:15 pm-4:30 pm

1 stop4h 15m

$237

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Tue 1/6

6:00 am-11:26 am

1 stop5h 26m

Harlingen Valley Intl

Sun 1/11

5:25 pm-10:00 pm

1 stop4h 35m

$249

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Sun 12/7

2:55 pm-10:30 pm

1 stop7h 35m

Harlingen Valley Intl

Sat 12/13

2:40 pm-7:40 pm

1 stop5h 00m

$253

Kansas CityHarlingen

MCI - HRL

MCIHRL

Kansas City

Tue 12/9

7:00 am-5:39 pm

2 stops10h 39m

Harlingen Valley Intl

Tue 12/16

5:36 am-1:51 pm

2 stops8h 15m

$258

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Tue 12/23

6:05 am-2:20 pm

1 stop8h 15m

Harlingen Valley Intl

Sun 12/28

3:15 pm-10:16 pm

1 stop7h 01m

$437

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Tue 12/23

6:05 am-2:20 pm

1 stop8h 15m

Harlingen Valley Intl

Sun 12/28

3:15 pm-10:16 pm

1 stop7h 01m

$473

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Fri 12/19

9:50 am-9:22 am

3 stops23h 32m

Harlingen Valley Intl

Mon 1/5

11:47 am-10:56 am

3 stops23h 09m

$831

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Harlingen from

How to get the cheapest flight ticket from Missouri to Harlingen, Texas

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Harlingen, Texas?

The cheapest day to depart on your flight to Harlingen, Texas is on a Monday when prices can be found for as low as $290. This is often the case because there is less demand to fly during this day of the week. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Missouri to Harlingen, Texas for around $421.

What is the cheapest time of day to depart on your flight to Harlingen, Texas?

Our most recent data shows that the best time of day to fly to Harlingen, Texas is in the afternoon. Flights from Missouri to Harlingen, Texas during this time can be as low as $377. Flights in the morning are often more expensive with an average ticket price of $397.

Can stopping save me money on Missouri to Harlingen, Texas flights?

You could potentially save up to 60% on your flight if you consider stops on a Missouri to Harlingen, Texas flight.

Cheap Missouri to Harlingen, Texas flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Missouri to Harlingen, Texas

Direct flights

None
There are no direct flights from Missouri to Harlingen, Texas. There are no popular flight routes from Missouri to Harlingen, Texas.
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  • When did momondo last update prices for flights from Missouri to Harlingen Valley Intl Airport?

    Prices for flights from Missouri to Harlingen Valley Intl Airport were last updated today.

  • How many operators does momondo search for flights from Missouri to Harlingen Valley Intl Airport?

  • How old do you have to be to fly from Missouri to Harlingen Valley Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Missouri to Harlingen Valley Intl Airport.

  • What documentation or ID do you need to fly to Harlingen Valley Intl Airport?

    The travel and health documents you'll need for your trip to Harlingen Valley Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Harlingen Valley Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Missouri to Harlingen, Texas

Compare and see reviews for airlines that fly from Missouri to Harlingen, Texas with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $196Free CancellationRating
8.0
4,238 reviews
Search Southwest flights
American AirlinesPriceFrom $221Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights
United AirlinesPriceFrom $248Free CancellationRating
7.4
9,012 reviews
Search United Airlines flights
DeltaPriceFrom $353Free CancellationRating
7.9
8,004 reviews
Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Missouri to Harlingen?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Missouri to Harlingen. momondo saves you time and could save you money on your trip.

Can I find flights from Missouri to Harlingen with flexible booking policies on momondo?

Flights from Missouri to Harlingen with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Missouri to Harlingen?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Harlingen from Missouri.

I’m not ready to book a flight from Missouri to Harlingen right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Harlingen from Missouri. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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