How does KAYAK find such low prices on flights from Illinois to Harlingen?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Harlingen.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Harlingen?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Harlingen from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Illinois to Harlingen?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Harlingen with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Harlingen?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Harlingen from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$104 CHEAP FLIGHTS from Illinois to Harlingen

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Flight Deals

Cheap Flights from Illinois to Harlingen

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Illinois to Harlingen

Tue, Nov 3 - Sat, Nov 7

12:02 pm - 6:11 pmORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

6h 09m1 stop Dallas/Fort Worth

6:41 pm - 11:59 pmHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

5h 18m1 stop Dallas/Fort Worth

$207American Airlines

Wed, Oct 14 - Wed, Oct 21

7:30 am - 1:23 pmORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

5h 53m1 stop Houston George Bush Intcntl

5:05 am - 11:16 amHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

6h 11m1 stop Houston George Bush Intcntl

$217United Airlines

Thu, Jan 28 - Sat, Jan 30

5:00 am - 10:19 amORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

5h 19m1 stop Dallas/Fort Worth

6:41 pm - 11:59 pmHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

5h 18m1 stop Dallas/Fort Worth

$220American Airlines

Fri, Jan 1 - Tue, Jan 5

6:15 am - 1:30 pmSTL Lambert-St Louis-HRL Harlingen Valley Intl

7h 15m1 stop Houston George Bush Intcntl

5:16 pm - 10:13 pmHRL Harlingen Valley Intl-STL Lambert-St Louis

4h 57m1 stop Houston George Bush Intcntl

$225United Airlines

Wed, Oct 14 - Mon, Oct 19

7:30 am - 1:23 pmORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

5h 53m1 stop Houston George Bush Intcntl

5:18 pm - 11:27 pmHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

6h 09m1 stop Houston George Bush Intcntl

$247United Airlines

Wed, Jan 27 - Wed, Feb 10

3:43 pm - 10:54 pmSTL Lambert-St Louis-HRL Harlingen Valley Intl

7h 11m1 stop Dallas/Fort Worth

6:41 pm - 11:33 pmHRL Harlingen Valley Intl-STL Lambert-St Louis

4h 52m1 stop Dallas/Fort Worth

$285American Airlines

Wed, Jan 27 - Wed, Feb 10

8:25 am - 4:00 pmSTL Lambert-St Louis-HRL Harlingen Valley Intl

7h 35m2 stops Dallas Love Field Houston Hobby

6:50 am - 1:50 pmHRL Harlingen Valley Intl-STL Lambert-St Louis

7h 00m2 stops Houston Hobby Nashville Intl

$352Southwest

Thu, Dec 31 - Tue, Jan 5

5:30 am - 10:55 amSTL Lambert-St Louis-HRL Harlingen Valley Intl

5h 25m2 stops Dallas Love Field Austin Bergstrom

7:25 am - 1:50 pmHRL Harlingen Valley Intl-STL Lambert-St Louis

6h 25m2 stops Austin Bergstrom Dallas Love Field

$365Southwest

Tue, Dec 29 - Sun, Jan 3

6:40 pm - 10:49 amORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

16h 09m1 stop Minneapolis St Paul

11:52 am - 6:50 pmHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

6h 58m1 stop Minneapolis St Paul

$605Sun Country Air

Mon, Dec 28 - Sun, Jan 3

7:40 pm - 9:52 amORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

14h 12m1 stop Minneapolis St Paul

11:52 am - 6:50 pmHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

6h 58m1 stop Minneapolis St Paul

$625Sun Country Air

Recent last minute flight deals from Illinois to Harlingen

Sat, Sep 19 - Wed, Sep 23

2:16 pm - 7:39 pmORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

5h 23m1 stop Houston George Bush Intcntl

5:18 pm - 11:27 pmHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

6h 09m1 stop Houston George Bush Intcntl

$389United Airlines

Sat, Sep 19 - Tue, Sep 29

2:16 pm - 7:39 pmORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

5h 23m1 stop Houston George Bush Intcntl

5:05 am - 11:16 amHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

6h 11m1 stop Houston George Bush Intcntl

$479United Airlines

Sat, Sep 19 - Wed, Sep 30

5:00 am - 9:58 amORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

4h 58m1 stop Dallas/Fort Worth

3:35 pm - 11:30 pmHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

7h 55m1 stop Dallas/Fort Worth

$479American Airlines

Sat, Sep 19 - Sat, Sep 26

7:30 am - 1:24 pmORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

5h 54m1 stop Houston George Bush Intcntl

5:05 am - 12:25 pmHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

7h 20m1 stop Houston George Bush Intcntl

$479United Airlines

Sat, Sep 19 - Fri, Oct 2

2:16 pm - 7:39 pmORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

5h 23m1 stop Houston George Bush Intcntl

2:00 pm - 9:42 pmHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

7h 42m1 stop Houston George Bush Intcntl

$499United Airlines

Sat, Sep 19 - Thu, Oct 1

4:11 pm - 9:52 pmORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

5h 41m1 stop Houston George Bush Intcntl

5:18 pm - 12:23 amHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

7h 05m1 stop Houston George Bush Intcntl

$499United Airlines

Sun, Sep 20 - Sat, Sep 26

5:00 am - 9:58 amORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

4h 58m1 stop Dallas/Fort Worth

3:35 pm - 9:09 pmHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

5h 34m1 stop Dallas/Fort Worth

$516American Airlines

Sat, Sep 19 - Sun, Sep 27

2:16 pm - 7:39 pmORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

5h 23m1 stop Houston George Bush Intcntl

5:05 am - 10:16 amHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

5h 11m1 stop Houston George Bush Intcntl

$516United Airlines

Mon, Sep 21 - Tue, Sep 29

6:30 am - 1:24 pmORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

6h 54m1 stop Houston George Bush Intcntl

5:05 am - 11:16 amHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

6h 11m1 stop Houston George Bush Intcntl

$516United Airlines

Mon, Sep 21 - Wed, Sep 30

6:30 am - 1:24 pmORD Chicago O'Hare Intl-HRL Harlingen Valley Intl

6h 54m1 stop Houston George Bush Intcntl

5:05 am - 10:16 amHRL Harlingen Valley Intl-ORD Chicago O'Hare Intl

5h 11m1 stop Houston George Bush Intcntl

$516United Airlines

Useful Info

Low season	July
High season	March
Cheapest flight	$104

Best time to beat the crowds but there is an average 41% increase in price.

Most popular time to fly with an average 8% increase in price.

Flight from Chicago O'Hare Airport to Harlingen

How does KAYAK find such low prices on flights from Illinois to Harlingen?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Harlingen.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Harlingen?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Harlingen from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to Harlingen?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Harlingen with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Harlingen?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Harlingen from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.