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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 5/28. 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
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.
United Airlines Logo
2:15 pm - 7:33 pm
ORD
-
HRL
5h 18m
1 stop
United Airlines Logo
5:10 am - 10:07 am
HRL
-
ORD
4h 57m
1 stop
$261United Airlines
Wed, Oct 7 - Tue, Nov 17
American Airlines Logo
5:00 am - 10:13 am
ORD
-
HRL
5h 13m
1 stop
American Airlines Logo
5:18 pm - 12:42 am
HRL
-
ORD
7h 24m
1 stop
$293American Airlines
Tue, May 26 - Sat, May 30
American Airlines Logo
5:00 am - 10:04 am
ORD
-
HRL
5h 04m
1 stop
American Airlines Logo
6:43 pm - 11:58 pm
HRL
-
ORD
5h 15m
1 stop
$300American Airlines
Sat, Aug 15 - Sat, Aug 22
American Airlines Logo
5:00 am - 10:12 am
ORD
-
HRL
5h 12m
1 stop
American Airlines Logo
4:58 pm - 12:50 am
HRL
-
ORD
7h 52m
1 stop
$326American Airlines
Fri, Jul 3 - Tue, Jul 7
American Airlines Logo
5:29 am - 10:13 am
STL
-
HRL
4h 44m
1 stop
American Airlines Logo
4:57 pm - 9:37 pm
HRL
-
STL
4h 40m
1 stop
$328American Airlines
Wed, Jun 17 - Tue, Jun 23
American Airlines Logo
5:25 am - 10:13 am
STL
-
HRL
4h 48m
1 stop
American Airlines Logo
5:18 pm - 9:42 pm
HRL
-
STL
4h 24m
1 stop
$332American Airlines
Tue, May 26 - Sat, May 30
United Airlines Logo
2:15 pm - 9:54 pm
ORD
-
HRL
7h 39m
1 stop
United Airlines Logo
5:10 am - 10:20 am
HRL
-
ORD
5h 10m
1 stop
$345United Airlines
Thu, Jul 30 - Thu, Aug 6
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
$364Southwest
Tue, May 26 - Mon, Jun 1
Southwest Logo
2:20 pm - 8:50 pm
STL
-
HRL
6h 30m
2 stops
Southwest Logo
5:00 pm - 9:10 pm
HRL
-
STL
4h 10m
1 stop
$368Southwest
Wed, Jun 17 - Tue, Jun 23
Southwest Logo
5:50 am - 12:05 pm
STL
-
HRL
6h 15m
2 stops
Southwest Logo
12:45 pm - 7:20 pm
HRL
-
STL
6h 35m
2 stops
$427Southwest
Wed, Jun 17 - Tue, Jun 23

Southwest flights from Illinois to Harlingen

Our best Southwest deals on Illinois to Harlingen flight tickets
Southwest
Jul 8
STL6:00 pmLambert-St Louis
5h 00m
1 stop
HRL11:00 pmHarlingen Valley Intl
Jul 12
HRL4:35 pmHarlingen Valley Intl
7h 35m
2 stops
STL12:10 amLambert-St Louis
$358
Southwest
May 26
ORD11:55 amChicago O'Hare Intl
5h 25m
1 stop
HRL5:20 pmHarlingen Valley Intl
Jun 1
HRL6:55 amHarlingen Valley Intl
6h 20m
1 stop
ORD1:15 pmChicago O'Hare Intl
$364
Southwest
Jun 17
STL2:20 pmLambert-St Louis
6h 30m
2 stops
HRL8:50 pmHarlingen Valley Intl
Jun 23
HRL5:00 pmHarlingen Valley Intl
4h 10m
1 stop
STL9:10 pmLambert-St Louis
$368

United Airlines flights from Illinois to Harlingen

Our best United Airlines deals on Illinois to Harlingen flight tickets
United Airlines
Oct 7
ORD2:15 pmChicago O'Hare Intl
5h 18m
1 stop
HRL7:33 pmHarlingen Valley Intl
Nov 17
HRL5:10 amHarlingen Valley Intl
4h 57m
1 stop
ORD10:07 amChicago O'Hare Intl
$261
United Airlines
Jul 30
ORD2:15 pmChicago O'Hare Intl
7h 39m
1 stop
HRL9:54 pmHarlingen Valley Intl
Aug 6
HRL5:10 amHarlingen Valley Intl
5h 10m
1 stop
ORD10:20 amChicago O'Hare Intl
$345
United Airlines
Aug 25
ORD7:30 amChicago O'Hare Intl
5h 54m
1 stop
HRL1:24 pmHarlingen Valley Intl
Aug 26
HRL1:59 pmHarlingen Valley Intl
7h 33m
1 stop
ORD9:32 pmChicago O'Hare Intl
$351

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 May 13, 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

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Wed 10/7

2:15 pm-7:33 pm

1 stop5h 18m

Harlingen Valley Intl

Tue 11/17

5:10 am-10:07 am

1 stop4h 57m

$261

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Tue 5/26

5:00 am-10:13 am

1 stop5h 13m

Harlingen Valley Intl

Sat 5/30

5:18 pm-12:42 am

1 stop7h 24m

$293

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Sat 8/15

5:00 am-10:04 am

1 stop5h 04m

Harlingen Valley Intl

Sat 8/22

6:43 pm-11:58 pm

1 stop5h 15m

$300

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Fri 7/3

5:00 am-10:12 am

1 stop5h 12m

Harlingen Valley Intl

Tue 7/7

4:58 pm-12:50 am

1 stop7h 52m

$326

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Wed 6/17

5:29 am-10:13 am

1 stop4h 44m

Harlingen Valley Intl

Tue 6/23

4:57 pm-9:37 pm

1 stop4h 40m

$328
Quickest round-trip

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Tue 5/26

5:25 am-10:13 am

1 stop4h 48m

Harlingen Valley Intl

Sat 5/30

5:18 pm-9:42 pm

1 stop4h 24m

$332

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Thu 7/30

2:15 pm-9:54 pm

1 stop7h 39m

Harlingen Valley Intl

Thu 8/6

5:10 am-10:20 am

1 stop5h 10m

$345

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Tue 5/26

11:55 am-5:20 pm

1 stop5h 25m

Harlingen Valley Intl

Mon 6/1

6:55 am-1:15 pm

1 stop6h 20m

$364

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Wed 6/17

2:20 pm-8:50 pm

2 stops6h 30m

Harlingen Valley Intl

Tue 6/23

5:00 pm-9:10 pm

1 stop4h 10m

$368

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Wed 6/17

5:50 am-12:05 pm

2 stops6h 15m

Harlingen Valley Intl

Tue 6/23

12:45 pm-7:20 pm

2 stops6h 35m

$427

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

Can stopping save me money on Illinois to Harlingen flights?

You could potentially save up to 8% 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 44m

Direct flights

None
The fastest flight from Illinois to Harlingen takes 4h 44m
There are no direct flights from Illinois to Harlingen. There are no popular flight routes from Illinois to Harlingen.
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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
8.0
4,295 reviews
Search Southwest flights
American AirlinesPriceFrom $233Free CancellationRating
7.1
11,661 reviews
Search American Airlines flights
United AirlinesPriceFrom $251Free CancellationRating
7.4
9,701 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.

An easier way to manage your Harlingen trip

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