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Cheap flights from Illinois to Harlingen from $145

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 5/9. 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
2:10 pm - 7:56 pm
ORD
-
HRL
5h 46m
1 stop
United Airlines Logo
5:25 pm - 11:59 pm
HRL
-
ORD
6h 34m
1 stop
$211United Airlines
Tue, Mar 10 - Thu, Mar 19
American Airlines Logo
4:40 pm - 10:51 pm
ORD
-
HRL
6h 11m
1 stop
American Airlines Logo
2:47 pm - 10:45 pm
HRL
-
ORD
7h 58m
1 stop
$273American Airlines
Wed, Apr 8 - Sat, Apr 11
Southwest Logo
6:30 pm - 12:05 am
STL
-
HRL
5h 35m
1 stop
Southwest Logo
5:10 am - 1:55 pm
HRL
-
STL
8h 45m
1 stop
$293Southwest
Mon, Mar 23 - Sat, Mar 28
Southwest Logo
5:45 am - 11:40 am
STL
-
HRL
5h 55m
1 stop
Southwest Logo
5:05 am - 9:35 am
HRL
-
STL
4h 30m
1 stop
$294Southwest
Sat, Feb 28 - Sat, Mar 7
Southwest Logo
2:40 pm - 12:05 am
ORD
-
HRL
9h 25m
2 stops
Southwest Logo
6:50 am - 2:20 pm
HRL
-
ORD
7h 30m
1 stop
$295Southwest
Mon, Mar 16 - Thu, Mar 19
Southwest Logo
5:00 pm - 10:15 pm
STL
-
HRL
5h 15m
1 stop
Southwest Logo
5:25 pm - 9:50 pm
HRL
-
STL
4h 25m
1 stop
$309Southwest
Tue, Feb 17 - Sat, Feb 21
American Airlines Logo
5:00 am - 10:12 am
ORD
-
HRL
5h 12m
1 stop
American Airlines Logo
8:06 pm - 12:55 am
HRL
-
ORD
4h 49m
1 stop
$309American Airlines
Sun, Feb 15 - Thu, Feb 19
Southwest Logo
5:00 pm - 10:15 pm
STL
-
HRL
5h 15m
1 stop
Southwest Logo
6:15 am - 12:00 pm
HRL
-
STL
5h 45m
2 stops
$314Southwest
Tue, Feb 17 - Sat, Feb 21
Southwest Logo
3:45 pm - 9:25 pm
ORD
-
HRL
5h 40m
1 stop
Southwest Logo
12:30 pm - 9:55 pm
HRL
-
ORD
9h 25m
2 stops
$315Southwest
Tue, Mar 10 - Thu, Mar 19
United Airlines Logo
4:03 pm - 9:59 pm
ORD
-
HRL
5h 56m
1 stop
United Airlines Logo
7:00 am - 8:23 pm
HRL
-
ORD
13h 23m
2 stops
$340United Airlines
Wed, Apr 8 - Sat, Apr 11

United Airlines flights from Illinois to Harlingen, Texas

Our best United Airlines deals on Illinois to Harlingen, Texas flight tickets
United Airlines
Mar 10
ORD2:10 pmChicago O'Hare Intl
5h 46m
1 stop
HRL7:56 pmHarlingen Valley Intl
Mar 19
HRL5:25 pmHarlingen Valley Intl
6h 34m
1 stop
ORD11:59 pmChicago O'Hare Intl
$211
United Airlines
Apr 8
ORD4:03 pmChicago O'Hare Intl
5h 56m
1 stop
HRL9:59 pmHarlingen Valley Intl
Apr 11
HRL7:00 amHarlingen Valley Intl
13h 23m
2 stops
ORD8:23 pmChicago O'Hare Intl
$340
United Airlines
Mar 17
ORD2:10 pmChicago O'Hare Intl
7h 46m
1 stop
HRL9:56 pmHarlingen Valley Intl
Mar 19
HRL5:25 pmHarlingen Valley Intl
5h 43m
1 stop
ORD11:08 pmChicago O'Hare Intl
$348

American Airlines flights from Illinois to Harlingen, Texas

Our best American Airlines deals on Illinois to Harlingen, Texas flight tickets
American Airlines
Apr 8
ORD4:40 pmChicago O'Hare Intl
6h 11m
1 stop
HRL10:51 pmHarlingen Valley Intl
Apr 11
HRL2:47 pmHarlingen Valley Intl
7h 58m
1 stop
ORD10:45 pmChicago O'Hare Intl
$273
American Airlines
Feb 15
ORD5:00 amChicago O'Hare Intl
5h 12m
1 stop
HRL10:12 amHarlingen Valley Intl
Feb 19
HRL8:06 pmHarlingen Valley Intl
4h 49m
1 stop
ORD12:55 amChicago O'Hare Intl
$309
American Airlines
Feb 16
ORD5:00 amChicago O'Hare Intl
5h 12m
1 stop
HRL10:12 amHarlingen Valley Intl
Feb 20
HRL8:06 pmHarlingen Valley Intl
4h 49m
1 stop
ORD12:55 amChicago O'Hare Intl
$334

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 February 2, 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

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Tue 3/10

2:10 pm-7:56 pm

1 stop5h 46m

Harlingen Valley Intl

Thu 3/19

5:25 pm-11:59 pm

1 stop6h 34m

$211

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Wed 4/8

4:40 pm-10:51 pm

1 stop6h 11m

Harlingen Valley Intl

Sat 4/11

2:47 pm-10:45 pm

1 stop7h 58m

$273

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Mon 3/23

6:30 pm-12:05 am

1 stop5h 35m

Harlingen Valley Intl

Sat 3/28

5:10 am-1:55 pm

1 stop8h 45m

$293

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Sat 2/28

5:45 am-11:40 am

1 stop5h 55m

Harlingen Valley Intl

Sat 3/7

5:05 am-9:35 am

1 stop4h 30m

$294

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Mon 3/16

2:40 pm-12:05 am

2 stops9h 25m

Harlingen Valley Intl

Thu 3/19

6:50 am-2:20 pm

1 stop7h 30m

$295

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Tue 2/17

5:00 pm-10:15 pm

1 stop5h 15m

Harlingen Valley Intl

Sat 2/21

5:25 pm-9:50 pm

1 stop4h 25m

$309

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Sun 2/15

5:00 am-10:12 am

1 stop5h 12m

Harlingen Valley Intl

Thu 2/19

8:06 pm-12:55 am

1 stop4h 49m

$309

St. LouisHarlingen

STL - HRL

STLHRL

Lambert-St Louis

Tue 2/17

5:00 pm-10:15 pm

1 stop5h 15m

Harlingen Valley Intl

Sat 2/21

6:15 am-12:00 pm

2 stops5h 45m

$314

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Tue 3/10

3:45 pm-9:25 pm

1 stop5h 40m

Harlingen Valley Intl

Thu 3/19

12:30 pm-9:55 pm

2 stops9h 25m

$315

ChicagoHarlingen

ORD - HRL

ORDHRL

Chicago O'Hare Intl

Wed 4/8

4:03 pm-9:59 pm

1 stop5h 56m

Harlingen Valley Intl

Sat 4/11

7:00 am-8:23 pm

2 stops13h 23m

$340

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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 1% 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 $222Free CancellationRating
8.0
4,273 reviews
Search Southwest flights
United AirlinesPriceFrom $251Free CancellationRating
7.4
9,220 reviews
Search United Airlines flights
American AirlinesPriceFrom $278Free CancellationRating
7.2
11,212 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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