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Cheap flights from Harlingen, Texas to Illinois from $140

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Harlingen, Texas to Illinois departing on 12/23. 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 Harlingen, Texas to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
6:10 pm - 11:35 pmHRL-ORD
5h 25m1 stop
American Airlines Logo
5:18 am - 11:40 amORD-HRL
6h 22m1 stop
$251American Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
Sun Country Air Logo
11:37 am - 9:50 amHRL-ORD
22h 13m1 stop
Sun Country Air Logo
11:45 am - 10:53 amORD-HRL
23h 08m1 stop
$265Sun Country Air
Find Deal
Sun, Dec 21 - Wed, Dec 31
United Airlines Logo
5:00 pm - 10:56 pmHRL-ORD
5h 56m1 stop
United Airlines Logo
2:21 pm - 9:54 pmORD-HRL
7h 33m1 stop
$269United Airlines
Find Deal
Wed, Dec 10 - Wed, Dec 17
American Airlines Logo
6:10 pm - 11:35 pmHRL-ORD
5h 25m1 stop
American Airlines Logo
10:24 am - 5:39 pmORD-HRL
7h 15m1 stop
$275American Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
American Airlines Logo
4:02 pm - 10:20 pmHRL-ORD
6h 18m1 stop
American Airlines Logo
7:29 am - 3:36 pmORD-HRL
8h 07m1 stop
$324American Airlines
Find Deal
Wed, Nov 19 - Sun, Nov 23
American Airlines Logo
2:46 pm - 10:26 pmHRL-ORD
7h 40m1 stop
American Airlines Logo
2:55 pm - 10:51 pmORD-HRL
7h 56m1 stop
$331American Airlines
Find Deal
Tue, Feb 24 - Wed, Feb 25
Multiple Airlines Logo
11:37 am - 9:50 amHRL-ORD
22h 13m1 stop
Multiple Airlines Logo
12:39 pm - 10:53 amORD-HRL
46h 14m2 stops
$363Multiple Airlines
Find Deal
Sun, Dec 21 - Wed, Dec 31
United Airlines Logo
5:00 pm - 10:56 pmHRL-ORD
5h 56m1 stop
United Airlines Logo
8:50 am - 9:54 pmORD-HRL
13h 04m2 stops
$378United Airlines
Find Deal
Wed, Dec 10 - Wed, Dec 17
Southwest Logo
5:45 am - 12:15 pmHRL-ORD
6h 30m2 stops
Southwest Logo
2:15 pm - 9:55 pmORD-HRL
7h 40m2 stops
$399Southwest
Find Deal
Sun, Nov 23 - Wed, Dec 3
Multiple Airlines Logo
12:22 pm - 8:20 amHRL-ORD
19h 58m1 stop
Multiple Airlines Logo
6:13 am - 11:01 amORD-HRL
28h 48m1 stop
$425Multiple Airlines
Find Deal
Wed, Nov 26 - Sun, Nov 30

American Airlines flights from Harlingen, Texas to Illinois

Our best American Airlines deals on Harlingen, Texas to Illinois flight tickets
American Airlines
Dec 3
HRL6:10 pmHarlingen Valley Intl
5h 25m
1 stop
ORD11:35 pmChicago O'Hare Intl
Dec 10
ORD5:18 amChicago O'Hare Intl
6h 22m
1 stop
HRL11:40 amHarlingen Valley Intl
$251
Find similar
American Airlines
Dec 3
HRL6:10 pmHarlingen Valley Intl
5h 25m
1 stop
ORD11:35 pmChicago O'Hare Intl
Dec 10
ORD10:24 amChicago O'Hare Intl
7h 15m
1 stop
HRL5:39 pmHarlingen Valley Intl
$275
Find similar
American Airlines
Nov 19
HRL4:02 pmHarlingen Valley Intl
6h 18m
1 stop
ORD10:20 pmChicago O'Hare Intl
Nov 23
ORD7:29 amChicago O'Hare Intl
8h 07m
1 stop
HRL3:36 pmHarlingen Valley Intl
$324
Find similar

United Airlines flights from Harlingen, Texas to Illinois

Our best United Airlines deals on Harlingen, Texas to Illinois flight tickets
United Airlines
Dec 10
HRL5:00 pmHarlingen Valley Intl
5h 56m
1 stop
ORD10:56 pmChicago O'Hare Intl
Dec 17
ORD2:21 pmChicago O'Hare Intl
7h 33m
1 stop
HRL9:54 pmHarlingen Valley Intl
$269
Find similar
United Airlines
Dec 10
HRL5:00 pmHarlingen Valley Intl
5h 56m
1 stop
ORD10:56 pmChicago O'Hare Intl
Dec 17
ORD8:50 amChicago O'Hare Intl
13h 04m
2 stops
HRL9:54 pmHarlingen Valley Intl
$378
Find similar
United Airlines
Dec 10
HRL5:00 pmHarlingen Valley Intl
7h 15m
1 stop
ORD12:15 amChicago O'Hare Intl
Dec 17
ORD8:50 amChicago O'Hare Intl
13h 04m
2 stops
HRL9:54 pmHarlingen Valley Intl
$386
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Harlingen, Texas to Illinois 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 4, 2025.
Use the filters below to find and compare flights from Harlingen, Texas to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HarlingenChicago

HRL - ORD

HRLORD

Harlingen Valley Intl

Wed 12/3

6:10 pm-11:35 pm

1 stop5h 25m

Chicago O'Hare Intl

Wed 12/10

5:18 am-11:40 am

1 stop6h 22m

$251

HarlingenChicago

HRL - ORD

HRLORD

Harlingen Valley Intl

Sun 12/21

11:37 am-9:50 am

1 stop22h 13m

Chicago O'Hare Intl

Wed 12/31

11:45 am-10:53 am

1 stop23h 08m

$265

HarlingenChicago

HRL - ORD

HRLORD

Harlingen Valley Intl

Wed 12/10

5:00 pm-10:56 pm

1 stop5h 56m

Chicago O'Hare Intl

Wed 12/17

2:21 pm-9:54 pm

1 stop7h 33m

$269

HarlingenChicago

HRL - ORD

HRLORD

Harlingen Valley Intl

Wed 12/3

6:10 pm-11:35 pm

1 stop5h 25m

Chicago O'Hare Intl

Wed 12/10

10:24 am-5:39 pm

1 stop7h 15m

$275

HarlingenChicago

HRL - ORD

HRLORD

Harlingen Valley Intl

Wed 11/19

4:02 pm-10:20 pm

1 stop6h 18m

Chicago O'Hare Intl

Sun 11/23

7:29 am-3:36 pm

1 stop8h 07m

$324

HarlingenChicago

HRL - ORD

HRLORD

Harlingen Valley Intl

Tue 2/24

2:46 pm-10:26 pm

1 stop7h 40m

Chicago O'Hare Intl

Wed 2/25

2:55 pm-10:51 pm

1 stop7h 56m

$331

HarlingenChicago

HRL - ORD

HRLORD

Harlingen Valley Intl

Sun 12/21

11:37 am-9:50 am

1 stop22h 13m

Chicago O'Hare Intl

Wed 12/31

12:39 pm-10:53 am

2 stops46h 14m

$363

HarlingenChicago

HRL - ORD

HRLORD

Harlingen Valley Intl

Wed 12/10

5:00 pm-10:56 pm

1 stop5h 56m

Chicago O'Hare Intl

Wed 12/17

8:50 am-9:54 pm

2 stops13h 04m

$378

HarlingenChicago

HRL - ORD

HRLORD

Harlingen Valley Intl

Sun 11/23

5:45 am-12:15 pm

2 stops6h 30m

Chicago O'Hare Intl

Wed 12/3

2:15 pm-9:55 pm

2 stops7h 40m

$399

HarlingenChicago

HRL - ORD

HRLORD

Harlingen Valley Intl

Wed 11/26

12:22 pm-8:20 am

1 stop19h 58m

Chicago O'Hare Intl

Sun 11/30

6:13 am-11:01 am

1 stop28h 48m

$425

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 Illinois from

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

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 Illinois?

The cheapest month to fly to Illinois from Harlingen, Texas is in May. Flight prices, which tend to average around $257, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of May, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $278.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Harlingen, Texas to Illinois is on a Wednesday when prices can be found for as low as $263. Flights from Harlingen, Texas to Illinois on a Saturday will generally be more expensive and average around $676. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Harlingen, Texas to Illinois during this time can be as low as $351. Flights at noon are often more expensive with an average ticket price of $676.

What is the cheapest Harlingen Valley Intl to Illinois flight route?

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

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

There is only 1 cabin class available to choose from on Harlingen Valley Intl to Illinois 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 Harlingen, Texas to Illinois flights?

You could potentially save up to 49% on your flight if you consider stops on a Harlingen, Texas to Illinois flight.

Cheap Harlingen, Texas to Illinois flight deals and tips

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

Direct flights

None
There are no direct flights from Harlingen, Texas to Illinois. There are no popular flight routes from Harlingen, Texas to Illinois.
Search flight deals

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

    Prices for flights from Harlingen Valley Intl Airport to Illinois refresh daily.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Harlingen Valley Intl Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Harlingen, Texas to Illinois

Compare and see reviews for airlines that fly from Harlingen, Texas to Illinois with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $217Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
SouthwestPriceFrom $252Free CancellationRating
8.0
4,239 reviews
Search Southwest flights
United AirlinesPriceFrom $288Free CancellationRating
7.4
9,002 reviews
Search United Airlines flights

Why use momondo?

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

It is quick and easy to find Harlingen to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

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

Yes. All flights to Illinois from Harlingen on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Illinois from Harlingen. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Harlingen to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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