$146 Find Cheap Flights from Harlingen to Illinois - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Harlingen to Illinois departing on 10/24. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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1 adult, Economy, 0 bags

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Book Cheap Harlingen to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Harlingen to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Harlingen to Illinois

Sat, Sep 5 - Wed, Sep 9
American Airlines Logo
3:17 pm - 9:16 pm
HRL
-
ORD
5h 59m
1 stop
American Airlines Logo
3:00 pm - 10:48 pm
ORD
-
HRL
7h 48m
1 stop
$291American Airlines
Wed, Sep 9 - Fri, Sep 11
American Airlines Logo
5:28 pm - 11:30 pm
HRL
-
ORD
6h 02m
1 stop
American Airlines Logo
3:50 pm - 10:48 pm
ORD
-
HRL
6h 58m
1 stop
$291American Airlines
Sat, Sep 5 - Wed, Sep 9
United Airlines Logo
5:18 pm - 12:59 am
HRL
-
ORD
7h 41m
1 stop
United Airlines Logo
4:11 pm - 9:52 pm
ORD
-
HRL
5h 41m
1 stop
$291United Airlines
Tue, Aug 25 - Sat, Aug 29
United Airlines Logo
5:18 pm - 11:26 pm
HRL
-
ORD
6h 08m
1 stop
United Airlines Logo
4:11 pm - 9:52 pm
ORD
-
HRL
5h 41m
1 stop
$291United Airlines
Wed, Sep 9 - Fri, Sep 11
United Airlines Logo
5:05 am - 10:55 am
HRL
-
ORD
5h 50m
1 stop
United Airlines Logo
5:30 am - 1:24 pm
ORD
-
HRL
7h 54m
1 stop
$291United Airlines
Wed, Nov 11 - Wed, Nov 18
American Airlines Logo
2:47 pm - 10:15 pm
HRL
-
ORD
7h 28m
1 stop
American Airlines Logo
12:02 pm - 6:11 pm
ORD
-
HRL
6h 09m
1 stop
$292American Airlines
Tue, Nov 10 - Tue, Nov 17
Delta Logo
2:30 pm - 11:59 pm
HRL
-
ORD
9h 29m
2 stops
Delta Logo
6:30 am - 1:32 pm
ORD
-
HRL
7h 02m
1 stop
$296Delta
Tue, Nov 10 - Wed, Nov 18
Delta Logo
2:30 pm - 11:59 pm
HRL
-
ORD
9h 29m
2 stops
Delta Logo
6:30 am - 1:32 pm
ORD
-
HRL
7h 02m
1 stop
$296Delta
Wed, Nov 11 - Wed, Nov 18
Delta Logo
2:30 pm - 11:59 pm
HRL
-
ORD
9h 29m
2 stops
Delta Logo
6:30 am - 1:32 pm
ORD
-
HRL
7h 02m
1 stop
$296Delta
Sat, Sep 12 - Mon, Sep 14
American Airlines Logo
10:45 am - 6:25 pm
HRL
-
ORD
7h 40m
1 stop
American Airlines Logo
5:00 am - 9:58 am
ORD
-
HRL
4h 58m
1 stop
$315American Airlines
Booking Insights

KAYAK's insights & trends for Harlingen to Illinois flights

Get data-powered insights and trends into flights from Harlingen to Illinois to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Harlingen to Illinois?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Harlingen to Illinois departing in September.

Flight prices are below average for this route right now.

Flights to Illinois from Harlingen usually cost between $304 and $417 in September.
The lowest price found in the past 5 days was $291 on United Airlines (Sep 5-Sep 9).

What is the cheapest Harlingen to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Harlingen found in the last 5 days was to Chicago, at $676 round-trip. The most popular route is from Harlingen (HRL) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 5 days was $676.

What is the cheapest month to fly from Harlingen to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Harlingen to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Harlingen to Illinois is May, when tickets cost $298 (return) on average. On the other hand, the most expensive months are March and June, when the average cost of round-trip tickets is $540 and $473 respectively.

Good to know

Low season

January

Cheapest flight

$146
Best time to beat the crowds but there is an average 35% increase in price.
Most popular time to fly and prices are also 12% lower on average.
Flight from Harlingen to Chicago O'Hare Airport

FAQs - booking Illinois flights

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

    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 Harlingen to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Harlingen to 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 Harlingen to Illinois?

    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 from Harlingen to Illinois with an airline and back with another airline.

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

    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 from Harlingen to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Harlingen to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Harlingen to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Harlingen to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4226 reviews
8.6Crew
8.1Boarding
7.5Entertainment
8.0Comfort
7.0Food
Airline reviews

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

2.0 MediocreMatthew, Jun 2026
CVG - MDW
Read more Southwest reviews

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

The flight was smooth. The Southwest experience has degraded overall, but this one was okay.

The checking experience in Orlando was terrible, almost missed the flight. Too many travelers and Southwest completely understaffed.

no service at all due to turbulence. they should've at least given us snacks, there were only 10 people on the entire flight.

For the first time in a long time, the Wi-Fi actually worked the entire flight! The flight crew was amazing as usual.

Great flight. I didn't get a drink because I was asleep whole on the flight.

Love them will get a Southwest card to track my points and keep flying with them. My family and I were pleased with the services.

WiFi was not working and didn’t have a beverage service

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

The seats were comfortable, and the boarding process was pretty smooth.

The flight crew were very helpful. The seats were very close together. There was barely room to sit without touching the person next to you.

I’m an EP on AA every year for more than a decade but this was a very pleasant and surprising experience. Clean and sizable plane for HOU to CHI. 5 row first class. And excellent food in first class the steak option was really good. Your flight attendants even better. Seat 5A

Gluten free snack options and meals that offer both gluten free and dairy free.

Awful. Delayed flights, missed connection to Toronto. Hotel vouchers were for already booked hotels x3. Giant waste of my time

Boarded early, left early, arrived 40 mins early! A win win for me!

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

Overall it was good. I missed my connection but I was put on another flight.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

The delays (5 hrs) were a comedy of errors, and the multiple safety issues encountered were very concerning.

I don't understand why they can't have charging ports on seats in 2023. They only offer it as a 'premium seat' service. It's ridiculous

Nothing, I wont be flying American Airlines again and will not be recommending anyone to fly American Airlines. It was the worst experience flying I've ever had.

I love the e fact that the staff communicated swiftly when my flight was delayed and gate number changed

Delayed flight more than I hour. When boarding we spent some additional time on the plane before takeoff ....

They lost my baggage and I am still struggling to the information and update

It was good, the staff was great, and the food, was as usual, tea and biscuit. Bathroom was clean, and the plane was clean as well.

Boarding was quick and efficient. We arrived at our destination early.

As a first class customer, there was no power the entire flight which limited my ability to work. I find this unacceptable. The first 11 rows on the left side of the plan were out. I was only offered the option to charge my phone which was not the issue because my laptop was out of power. I asked if there was anything that can be done for me, and the answer was, "no". I was not offered any type of compensation for this AA problem which caused me unnecessary stress due to inability to address business issues on an already challenging travel day. Flight attendants tried to reset the power once but that was the extent of their support. Very disappointing for the lack of expected services on a flight. Please contact me with customer focused response to this complaint.

Update to handle the delay was very bad, crews no smiles or welcome or thanks. Don’t care attitude

After we landed we sat on the tarmac for 1.5 hours waiting to get to our gate. Ridiculous.

Everything was on time, we arrived early, everything worked well.

Everything you need to know for your flight from Harlingen to Illinois

Information on your arrival and departure airports