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Cheap flights from Illinois to Harlingen from $93

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Harlingen departing on 4/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Illinois to Harlingen

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
5:20 pm - 9:35 pm
STL
-
HRL
4h 15m
1 stop
Southwest Logo
4:40 pm - 10:20 pm
HRL
-
STL
5h 40m
1 stop
$189Southwest
Sat, Apr 25 - Tue, Apr 28
Southwest Logo
5:20 pm - 9:35 pm
STL
-
HRL
4h 15m
1 stop
Southwest Logo
7:10 am - 2:50 pm
HRL
-
STL
7h 40m
2 stops
$194Southwest
Sat, Apr 25 - Tue, Apr 28
Southwest Logo
8:30 am - 1:30 pm
STL
-
HRL
5h 00m
1 stop
Southwest Logo
5:10 pm - 11:30 pm
HRL
-
STL
6h 20m
1 stop
$261Southwest
Tue, Jun 9 - Sat, Jun 13
Southwest Logo
8:30 am - 1:30 pm
STL
-
HRL
5h 00m
1 stop
Southwest Logo
5:10 pm - 11:10 pm
HRL
-
STL
6h 00m
2 stops
$266Southwest
Tue, Jun 9 - Sat, Jun 13
Southwest Logo
11:55 am - 5:20 pm
ORD
-
HRL
5h 25m
1 stop
Southwest Logo
6:55 am - 1:15 pm
HRL
-
ORD
6h 20m
1 stop
$269Southwest
Wed, Apr 8 - Mon, Apr 13
United Airlines Logo
9:10 am - 9:59 pm
STL
-
HRL
12h 49m
2 stops
United Airlines Logo
5:18 pm - 10:28 pm
HRL
-
STL
5h 10m
1 stop
$270United Airlines
Tue, Apr 7 - Sat, Apr 11
United Airlines Logo
4:03 pm - 9:59 pm
ORD
-
HRL
5h 56m
1 stop
United Airlines Logo
5:18 pm - 12:45 am
HRL
-
ORD
7h 27m
1 stop
$277United Airlines
Tue, Apr 7 - Sat, Apr 11
American Airlines Logo
5:20 am - 10:17 am
STL
-
HRL
4h 57m
1 stop
American Airlines Logo
6:45 pm - 10:59 pm
HRL
-
STL
4h 14m
1 stop
$277American Airlines
Fri, Apr 10 - Tue, Apr 14
American Airlines Logo
5:00 am - 10:17 am
ORD
-
HRL
5h 17m
1 stop
American Airlines Logo
2:47 pm - 10:45 pm
HRL
-
ORD
7h 58m
1 stop
$297American Airlines
Fri, Apr 10 - Fri, Apr 17
Delta Logo
6:25 am - 3:05 pm
ORD
-
HRL
8h 40m
1 stop
Delta Logo
4:02 pm - 9:38 pm
HRL
-
ORD
5h 36m
1 stop
$316Delta
Fri, Apr 17 - Mon, Apr 20

American Airlines flights from Illinois to Harlingen, Texas

Our best American Airlines deals on Illinois to Harlingen, Texas flight tickets
American Airlines
Apr 10
STL5:20 amLambert-St Louis
4h 57m
1 stop
HRL10:17 amHarlingen Valley Intl
Apr 14
HRL6:45 pmHarlingen Valley Intl
4h 14m
1 stop
STL10:59 pmLambert-St Louis
$277
American Airlines
Apr 10
ORD5:00 amChicago O'Hare Intl
5h 17m
1 stop
HRL10:17 amHarlingen Valley Intl
Apr 17
HRL2:47 pmHarlingen Valley Intl
7h 58m
1 stop
ORD10:45 pmChicago O'Hare Intl
$297
American Airlines
Aug 8
ORD5:00 amChicago O'Hare Intl
5h 16m
1 stop
HRL10:16 amHarlingen Valley Intl
Aug 12
HRL4:58 pmHarlingen Valley Intl
6h 14m
1 stop
ORD11:12 pmChicago O'Hare Intl
$303

Southwest flights from Illinois to Harlingen, Texas

Our best Southwest deals on Illinois to Harlingen, Texas flight tickets
Southwest
Apr 25
STL5:20 pmLambert-St Louis
4h 15m
1 stop
HRL9:35 pmHarlingen Valley Intl
Apr 28
HRL4:40 pmHarlingen Valley Intl
5h 40m
1 stop
STL10:20 pmLambert-St Louis
$189
Southwest
Apr 25
STL5:20 pmLambert-St Louis
4h 15m
1 stop
HRL9:35 pmHarlingen Valley Intl
Apr 28
HRL7:10 amHarlingen Valley Intl
7h 40m
2 stops
STL2:50 pmLambert-St Louis
$194
Southwest
Jun 9
STL8:30 amLambert-St Louis
5h 00m
1 stop
HRL1:30 pmHarlingen Valley Intl
Jun 13
HRL5:10 pmHarlingen Valley Intl
6h 20m
1 stop
STL11:30 pmLambert-St Louis
$261

momondo Fare Finder

 
Customize your flight search to find flights from Illinois 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 March 26, 2026.
Use the filters below to find and compare flights from Illinois to Harlingen, Texas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Sat 4/25

5:20 pm-9:35 pm

1 stop4h 15m

Harlingen Valley Intl

Tue 4/28

4:40 pm-10:20 pm

1 stop5h 40m

$189

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Sat 4/25

5:20 pm-9:35 pm

1 stop4h 15m

Harlingen Valley Intl

Tue 4/28

7:10 am-2:50 pm

2 stops7h 40m

$194

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Tue 6/9

8:30 am-1:30 pm

1 stop5h 00m

Harlingen Valley Intl

Sat 6/13

5:10 pm-11:30 pm

1 stop6h 20m

$261

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Tue 6/9

8:30 am-1:30 pm

1 stop5h 00m

Harlingen Valley Intl

Sat 6/13

5:10 pm-11:10 pm

2 stops6h 00m

$266

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Wed 4/8

11:55 am-5:20 pm

1 stop5h 25m

Harlingen Valley Intl

Mon 4/13

6:55 am-1:15 pm

1 stop6h 20m

$269

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Tue 4/7

9:10 am-9:59 pm

2 stops12h 49m

Harlingen Valley Intl

Sat 4/11

5:18 pm-10:28 pm

1 stop5h 10m

$270

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Tue 4/7

4:03 pm-9:59 pm

1 stop5h 56m

Harlingen Valley Intl

Sat 4/11

5:18 pm-12:45 am

1 stop7h 27m

$277
Quickest round-trip

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Fri 4/10

5:20 am-10:17 am

1 stop4h 57m

Harlingen Valley Intl

Tue 4/14

6:45 pm-10:59 pm

1 stop4h 14m

$277

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Fri 4/10

5:00 am-10:17 am

1 stop5h 17m

Harlingen Valley Intl

Fri 4/17

2:47 pm-10:45 pm

1 stop7h 58m

$297

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Fri 4/17

6:25 am-3:05 pm

1 stop8h 40m

Harlingen Valley Intl

Mon 4/20

4:02 pm-9:38 pm

1 stop5h 36m

$316

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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See travel insights to Harlingen from

How to get the cheapest flight ticket from Illinois 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 Illinois to Harlingen Valley Intl flight route?

Fly from Chicago O'Hare Intl to Harlingen Valley Intl for the best Illinois - Harlingen Valley Intl flight prices

What cabin class options are available on Illinois to Harlingen Valley Intl flights?

There is only 1 cabin class available to choose from on Illinois to Harlingen Valley Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

You could potentially save up to 7% on your flight if you consider stops on a Illinois to Harlingen, Texas flight.

Cheap Illinois to Harlingen, Texas flight deals and tips

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

Fastest flight time

4h 15m

Direct flights

None
The fastest flight from Illinois to Harlingen, Texas takes 4h 15m
There are no direct flights from Illinois to Harlingen, Texas. There are no popular flight routes from Illinois to Harlingen, Texas.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Harlingen Valley Intl Airport?

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

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

  • How old do you have to be to fly from Illinois 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 Illinois to Harlingen Valley Intl Airport.

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

    The travel and health documents required for your trip to Harlingen Valley Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Harlingen Valley Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Illinois to Harlingen, Texas?

Best airlines flying from Illinois to Harlingen, Texas

Compare and see reviews for airlines that fly from Illinois to Harlingen, Texas with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $216Free CancellationRating
8.0
4,330 reviews
Search Southwest flights
United AirlinesPriceFrom $251Free CancellationRating
7.4
9,494 reviews
Search United Airlines flights
American AirlinesPriceFrom $267Free CancellationRating
7.1
11,502 reviews
Search American Airlines flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Harlingen for you.

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

Yes. momondo enables you to select and highlight flights to Harlingen from Illinois with this policy.

How can momondo help me find flights from Illinois 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 Illinois.

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

If you are simply researching potential flights to Harlingen, momondo offers a useful price alert feature which will track prices for flights to Harlingen from Illinois and alert you when they change.

An easier way to manage your Harlingen, Texas trip

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