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Cheap flights from Illinois to Harlingen from $129

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 8/19. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Harlingen

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
8:30 am - 3:50 pm
STL
-
HRL
7h 20m
2 stops
Southwest Logo
3:30 pm - 7:45 pm
HRL
-
STL
4h 15m
1 stop
$234Southwest
Sat, Aug 15 - Sat, Aug 22
Southwest Logo
5:15 am - 10:50 am
STL
-
HRL
5h 35m
2 stops
Southwest Logo
11:30 am - 7:45 pm
HRL
-
STL
8h 15m
2 stops
$239Southwest
Sat, Aug 15 - Sat, Aug 22
American Airlines Logo
11:00 am - 4:58 pm
ORD
-
HRL
5h 58m
1 stop
American Airlines Logo
3:35 pm - 10:04 pm
HRL
-
ORD
6h 29m
1 stop
$257American Airlines
Tue, Sep 22 - Sat, Sep 26
American Airlines Logo
5:00 am - 10:04 am
ORD
-
HRL
5h 04m
1 stop
American Airlines Logo
6:43 pm - 12:18 am
HRL
-
ORD
5h 35m
1 stop
$269American Airlines
Sat, Aug 8 - Sat, Aug 15
American Airlines Logo
5:00 am - 10:04 am
ORD
-
HRL
5h 04m
1 stop
American Airlines Logo
6:43 pm - 12:18 am
HRL
-
ORD
5h 35m
1 stop
$281American Airlines
Tue, Aug 18 - Tue, Aug 25
American Airlines Logo
5:00 am - 10:04 am
ORD
-
HRL
5h 04m
1 stop
American Airlines Logo
3:17 pm - 11:30 pm
HRL
-
ORD
8h 13m
1 stop
$293American Airlines
Fri, Aug 14 - Sat, Aug 29
Delta Logo
6:30 am - 1:23 pm
ORD
-
HRL
6h 53m
1 stop
Delta Logo
2:13 pm - 11:51 pm
HRL
-
ORD
9h 38m
2 stops
$298Delta
Wed, Oct 21 - Fri, Oct 23
United Airlines Logo
6:30 am - 1:24 pm
ORD
-
HRL
6h 54m
1 stop
United Airlines Logo
5:18 pm - 12:59 am
HRL
-
ORD
7h 41m
1 stop
$309United Airlines
Fri, Aug 28 - Mon, Aug 31
Delta Logo
6:00 am - 1:31 pm
ORD
-
HRL
7h 31m
1 stop
Delta Logo
2:00 pm - 11:50 pm
HRL
-
ORD
9h 50m
2 stops
$314Delta
Sun, Nov 22 - Thu, Nov 26
United Airlines Logo
2:57 pm - 9:54 pm
STL
-
HRL
6h 57m
1 stop
United Airlines Logo
5:10 am - 10:07 am
HRL
-
STL
4h 57m
1 stop
$369United Airlines
Thu, Jul 9 - Sun, Jul 12

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American Airlines flights from Illinois to Harlingen

Our best American Airlines deals on Illinois to Harlingen flight tickets
American Airlines
Sep 22
ORD11:00 amChicago O'Hare Intl
5h 58m
1 stop
HRL4:58 pmHarlingen Valley Intl
Sep 26
HRL3:35 pmHarlingen Valley Intl
6h 29m
1 stop
ORD10:04 pmChicago O'Hare Intl
$257
American Airlines
Aug 8
ORD5:00 amChicago O'Hare Intl
5h 04m
1 stop
HRL10:04 amHarlingen Valley Intl
Aug 15
HRL6:43 pmHarlingen Valley Intl
5h 35m
1 stop
ORD12:18 amChicago O'Hare Intl
$269
American Airlines
Aug 18
ORD5:00 amChicago O'Hare Intl
5h 04m
1 stop
HRL10:04 amHarlingen Valley Intl
Aug 25
HRL6:43 pmHarlingen Valley Intl
5h 35m
1 stop
ORD12:18 amChicago O'Hare Intl
$281

Delta flights from Illinois to Harlingen

Our best Delta deals on Illinois to Harlingen flight tickets
Delta
Oct 21
ORD6:30 amChicago O'Hare Intl
6h 53m
1 stop
HRL1:23 pmHarlingen Valley Intl
Oct 23
HRL2:13 pmHarlingen Valley Intl
9h 38m
2 stops
ORD11:51 pmChicago O'Hare Intl
$298
Delta
Nov 22
ORD6:00 amChicago O'Hare Intl
7h 31m
1 stop
HRL1:31 pmHarlingen Valley Intl
Nov 26
HRL2:00 pmHarlingen Valley Intl
9h 50m
2 stops
ORD11:50 pmChicago O'Hare Intl
$314
Delta
Oct 21
ORD6:00 amChicago O'Hare Intl
7h 31m
1 stop
HRL1:31 pmHarlingen Valley Intl
Oct 23
HRL2:00 pmHarlingen Valley Intl
9h 50m
2 stops
ORD11:50 pmChicago O'Hare Intl
$363

momondo Fare Finder

 
Customize your flight search to find flights from Illinois 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, momondo users made 832,500 searches. Data last updated June 28, 2026.
Use the filters below to find and compare flights from Illinois to Harlingen 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 8/15

8:30 am-3:50 pm

2 stops7h 20m

Harlingen Valley Intl

Sat 8/22

3:30 pm-7:45 pm

1 stop4h 15m

$234

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Sat 8/15

5:15 am-10:50 am

2 stops5h 35m

Harlingen Valley Intl

Sat 8/22

11:30 am-7:45 pm

2 stops8h 15m

$239

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Tue 9/22

11:00 am-4:58 pm

1 stop5h 58m

Harlingen Valley Intl

Sat 9/26

3:35 pm-10:04 pm

1 stop6h 29m

$257
Quickest round-trip

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Sat 8/8

5:00 am-10:04 am

1 stop5h 04m

Harlingen Valley Intl

Sat 8/15

6:43 pm-12:18 am

1 stop5h 35m

$269

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Tue 8/18

5:00 am-10:04 am

1 stop5h 04m

Harlingen Valley Intl

Tue 8/25

6:43 pm-12:18 am

1 stop5h 35m

$281

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Fri 8/14

5:00 am-10:04 am

1 stop5h 04m

Harlingen Valley Intl

Sat 8/29

3:17 pm-11:30 pm

1 stop8h 13m

$293

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Wed 10/21

6:30 am-1:23 pm

1 stop6h 53m

Harlingen Valley Intl

Fri 10/23

2:13 pm-11:51 pm

2 stops9h 38m

$298

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Fri 8/28

6:30 am-1:24 pm

1 stop6h 54m

Harlingen Valley Intl

Mon 8/31

5:18 pm-12:59 am

1 stop7h 41m

$309

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Sun 11/22

6:00 am-1:31 pm

1 stop7h 31m

Harlingen Valley Intl

Thu 11/26

2:00 pm-11:50 pm

2 stops9h 50m

$314

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Thu 7/9

2:57 pm-9:54 pm

1 stop6h 57m

Harlingen Valley Intl

Sun 7/12

5:10 am-10:07 am

1 stop4h 57m

$369

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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

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 month to fly to Harlingen?

If you aren’t able to travel during the month of January, then book flights to Harlingen from Illinois during March instead. Flights to Harlingen in March, while not as cheap as those in January, still average around $156.

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 flights?

There is only 1 cabin class available to choose from on Illinois to Harlingen 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 flights?

You could potentially save up to 1% on your flight if you consider stops on a Illinois to Harlingen flight.

Cheap Illinois to Harlingen flight deals and tips

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

Fastest flight time

4h 05m

Direct flights

Sun

Airports in Harlingen

1 airport
The fastest flight from Illinois to Harlingen takes 4h 05m
Direct flights go from Illinois to Harlingen on Sunday. There are no airlines offering direct flights.
There is 1 airport in Harlingen. From Illinois there are direct flights to Harlingen Valley Intl (HRL).
Search flight deals

Frequently asked questions about flying from Illinois to Harlingen

  • 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?

Best airlines flying from Illinois to Harlingen

Compare and see reviews for airlines that fly from Illinois to Harlingen with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $216Free CancellationRating
7.9
4,246 reviews
Search Southwest flights
American AirlinesPriceFrom $233Free CancellationRating
7.1
11,774 reviews
Search American Airlines flights
United AirlinesPriceFrom $255Free CancellationRating
7.4
9,899 reviews
Search United 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.

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