$129+ Cheap flights from Harlingen (HRL) to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — ORD
Jul 28 — Aug 41
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Harlingen to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Harlingen to Illinois
Cheapest
Best
Last-minute
One-way
Cheapest flights from Harlingen to IllinoisExplore the most affordable flight options available from Harlingen to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 28, 2026.
Explore the most affordable flight options available from Harlingen to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 28, 2026.
This United Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:18 pm
HRL
- ORD
1 stop7h 41m
United Airlines
Tue 8/188:50 am
ORD
- HRL
1 stop7h 09m
United Airlines
Deal found 6/24![United Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/112:00 pm
HRL
- ORD
2 stops9h 50m
Delta
Sat 11/146:00 am
ORD
- HRL
1 stop7h 31m
Delta
Deal found 6/26![Delta logo]()
$262
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/245:18 pm
HRL
- ORD
1 stop6h 08m
United Airlines
Mon 8/316:30 am
ORD
- HRL
1 stop6h 54m
United Airlines
Deal found 6/28![United Airlines logo]()
$292
This American Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:43 pm
HRL
- ORD
1 stop5h 35m
American Airlines
Tue 8/115:00 am
ORD
- HRL
1 stop5h 04m
American Airlines
Deal found 6/26![American Airlines logo]()
$293
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:18 pm
HRL
- ORD
1 stop7h 41m
United Airlines
Sat 8/156:30 am
ORD
- HRL
1 stop6h 54m
United Airlines
Deal found 6/28![United Airlines logo]()
$307
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/82:00 pm
HRL
- ORD
1 stop7h 34m
Delta
Sun 10/116:00 am
ORD
- HRL
1 stop7h 31m
Delta
Deal found 6/23![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/45:10 am
HRL
- ORD
1 stop5h 10m
United Airlines
Sat 7/114:05 pm
ORD
- HRL
1 stop5h 49m
United Airlines
Deal found 6/27![United Airlines logo]()
$329
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/175:18 pm
HRL
- ORD
1 stop6h 08m
United Airlines
Wed 11/1810:30 am
ORD
- HRL
1 stop5h 30m
United Airlines
Deal found 6/25![United Airlines logo]()
$347
This American Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/144:58 pm
HRL
- ORD
1 stop7h 52m
American Airlines
Thu 7/165:00 am
ORD
- HRL
1 stop5h 12m
American Airlines
Deal found 6/25![American Airlines logo]()
$354
This American Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/104:58 pm
HRL
- ORD
1 stop6h 41m
American Airlines
Tue 7/148:30 am
ORD
- HRL
1 stop7h 53m
American Airlines
Deal found 6/25![American Airlines logo]()
$364
This American Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/244:58 pm
HRL
- ORD
1 stop7h 52m
American Airlines
Sat 8/15:00 am
ORD
- HRL
1 stop5h 12m
American Airlines
Deal found 6/25![American Airlines logo]()
$366
Best flights from Harlingen to IllinoisDiscover carefully curated flight deals from Harlingen to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 28, 2026.
Discover carefully curated flight deals from Harlingen to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 28, 2026.
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/245:18 pm
HRL
- ORD
1 stop6h 08m
United Airlines
Mon 8/316:30 am
ORD
- HRL
1 stop6h 54m
United Airlines
Deal found 6/28![United Airlines logo]()
$292
This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/152:00 pm
HRL
- ORD
1 stop5h 34m
Delta
Thu 12/316:00 am
ORD
- HRL
1 stop7h 31m
Delta
Deal found 6/24![Delta logo]()
$388
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:05 am
HRL
- ORD
1 stop5h 11m
United Airlines
Sun 11/16:55 am
ORD
- HRL
1 stop6h 29m
United Airlines
Deal found 6/25![United Airlines logo]()
$293
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:18 pm
HRL
- ORD
1 stop7h 41m
United Airlines
Sat 8/156:30 am
ORD
- HRL
1 stop6h 54m
United Airlines
Deal found 6/28![United Airlines logo]()
$307
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/171:59 pm
HRL
- ORD
1 stop5h 54m
United Airlines
Wed 11/185:45 pm
ORD
- HRL
1 stop5h 06m
United Airlines
Deal found 6/27![United Airlines logo]()
$347
This Delta deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/122:00 pm
HRL
- ORD
2 stops9h 50m
Delta
Tue 12/296:00 am
ORD
- HRL
1 stop7h 31m
Delta
Deal found 6/27![Delta logo]()
$443
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/125:16 pm
HRL
- ORD
1 stop6h 59m
United Airlines
Tue 12/294:57 pm
ORD
- HRL
1 stop4h 47m
United Airlines
Deal found 6/27![United Airlines logo]()
$427
This United Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/247:20 am
HRL
- ORD
1 stop25h 44m
United Airlines
Sat 8/110:35 am
ORD
- HRL
2 stops11h 19m
United Airlines
Deal found 6/24![United Airlines logo]()
$550
This United Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:05 am
HRL
- ORD
2 stops15h 28m
United Airlines
Sun 10/116:25 am
ORD
- HRL
1 stop6h 58m
United Airlines
Deal found 6/23![United Airlines logo]()
$554
Last-minute flights from Harlingen to IllinoisDiscover last-minute flight deals from Harlingen to Illinois. Data last updated June 28, 2026 and is based on user searches.
Discover last-minute flight deals from Harlingen to Illinois. Data last updated June 28, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/285:10 am
HRL
- ORD
1 stop5h 51m
United Airlines
Wed 7/17:35 am
ORD
- HRL
1 stop5h 55m
United Airlines
Deal found 6/23![United Airlines logo]()
$428
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/295:20 pm
HRL
- ORD
1 stop7h 25m
United Airlines
Wed 7/17:35 am
ORD
- HRL
1 stop5h 55m
United Airlines
Deal found 6/25![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/17:20 am
HRL
- ORD
1 stop5h 09m
United Airlines
Fri 7/32:15 pm
ORD
- HRL
1 stop7h 39m
United Airlines
Deal found 6/27![United Airlines logo]()
$476
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/45:10 am
HRL
- ORD
1 stop5h 10m
United Airlines
Sat 7/114:05 pm
ORD
- HRL
1 stop5h 49m
United Airlines
Deal found 6/27![United Airlines logo]()
$329
This American Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/74:58 pm
HRL
- ORD
1 stop7h 52m
American Airlines
Wed 7/85:00 am
ORD
- HRL
1 stop5h 12m
American Airlines
Deal found 6/25![American Airlines logo]()
$434
This American Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/104:58 pm
HRL
- ORD
1 stop6h 41m
American Airlines
Tue 7/148:30 am
ORD
- HRL
1 stop7h 53m
American Airlines
Deal found 6/25![American Airlines logo]()
$364
This American Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/144:58 pm
HRL
- ORD
1 stop7h 52m
American Airlines
Thu 7/165:00 am
ORD
- HRL
1 stop5h 12m
American Airlines
Deal found 6/25![American Airlines logo]()
$354
This American Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/244:58 pm
HRL
- ORD
1 stop7h 52m
American Airlines
Sat 8/15:00 am
ORD
- HRL
1 stop5h 12m
American Airlines
Deal found 6/23![American Airlines logo]()
$328
This American Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/244:58 pm
HRL
- ORD
1 stop7h 52m
American Airlines
Fri 7/315:00 am
ORD
- HRL
1 stop5h 12m
American Airlines
Deal found 6/26![American Airlines logo]()
$391
One-way flights from Harlingen to IllinoisSearch for one-way flight options from Harlingen to Illinois. Find affordable one-way fares based on user searches. Data last updated June 28, 2026.
Search for one-way flight options from Harlingen to Illinois. Find affordable one-way fares based on user searches. Data last updated June 28, 2026.
This American Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:43 pm
HRL
- ORD
1 stop5h 35m
American Airlines
Deal found 6/27![American Airlines logo]()
$129
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/152:00 pm
HRL
- ORD
2 stops9h 50m
Delta
Deal found 6/25![Delta logo]()
$134
This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/192:00 pm
HRL
- ORD
1 stop7h 34m
Delta
Deal found 6/24![Delta logo]()
$141
This United Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/211:59 pm
HRL
- ORD
1 stop7h 33m
United Airlines
Deal found 6/23![United Airlines logo]()
$145
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/235:16 pm
HRL
- ORD
1 stop6h 59m
United Airlines
Deal found 6/25![United Airlines logo]()
$159
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/212:00 pm
HRL
- ORD
1 stop7h 34m
Delta
Deal found 6/25![Delta logo]()
$165
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/242:00 pm
HRL
- ORD
2 stops9h 50m
Delta
Deal found 6/25![Delta logo]()
$170
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:18 pm
HRL
- ORD
1 stop7h 41m
United Airlines
Deal found 6/25![United Airlines logo]()
$174
This American Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:43 pm
HRL
- ORD
1 stop5h 35m
American Airlines
Deal found 6/28![American Airlines logo]()
$178
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/165:18 pm
HRL
- ORD
1 stop7h 41m
United Airlines
Deal found 6/27![United Airlines logo]()
$184
This United Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:18 pm
HRL
- ORD
1 stop7h 05m
United Airlines
Deal found 6/23![United Airlines logo]()
$190
Find flight deals from Harlingen to Illinois
Keep the following information in mind while searching for Harlingen to Illinois flight deals. Data was last updated June 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $257 (United Airlines) |
One-way from | $129 (American Airlines) |
Popular in | June |
Cheapest in | November |
Average price | $518 |
Cheapflights Fare Finder
Customize your flight search to find flights from Harlingen 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, Cheapflights users made 2,558,603 searches. Data last updated June 28, 2026.
Use the filters below to find and compare flights from Harlingen to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HarlingenChicago
HRL - ORD
HRLORD
Harlingen Valley Intl
Mon 8/24
5:18 pm-11:26 pm
1 stop6h 08m
Chicago O'Hare Intl
Mon 8/31
6:30 am-1:24 pm
1 stop6h 54m
$292
HarlingenChicago
HRL - ORD
HRLORD
Harlingen Valley Intl
Sat 10/24
5:05 am-10:16 am
1 stop5h 11m
Chicago O'Hare Intl
Sun 11/1
6:55 am-1:24 pm
1 stop6h 29m
$293
HarlingenChicago
HRL - ORD
HRLORD
Harlingen Valley Intl
Wed 8/12
5:18 pm-12:59 am
1 stop7h 41m
Chicago O'Hare Intl
Sat 8/15
6:30 am-1:24 pm
1 stop6h 54m
$307
Quickest round-trip
HarlingenChicago
HRL - ORD
HRLORD
Harlingen Valley Intl
Tue 11/17
1:59 pm-7:53 pm
1 stop5h 54m
Chicago O'Hare Intl
Wed 11/18
5:45 pm-10:51 pm
1 stop5h 06m
$347
HarlingenChicago
HRL - ORD
HRLORD
Harlingen Valley Intl
Tue 12/15
2:00 pm-7:34 pm
1 stop5h 34m
Chicago O'Hare Intl
Thu 12/31
6:00 am-1:31 pm
1 stop7h 31m
$388
HarlingenChicago
HRL - ORD
HRLORD
Harlingen Valley Intl
Sat 12/12
5:16 pm-12:15 am
1 stop6h 59m
Chicago O'Hare Intl
Tue 12/29
4:57 pm-9:44 pm
1 stop4h 47m
$427
HarlingenChicago
HRL - ORD
HRLORD
Harlingen Valley Intl
Sat 12/12
2:00 pm-11:50 pm
2 stops9h 50m
Chicago O'Hare Intl
Tue 12/29
6:00 am-1:31 pm
1 stop7h 31m
$443
HarlingenChicago
HRL - ORD
HRLORD
Harlingen Valley Intl
Fri 7/24
7:20 am-9:04 am
1 stop25h 44m
Chicago O'Hare Intl
Sat 8/1
10:35 am-9:54 pm
2 stops11h 19m
$550
HarlingenChicago
HRL - ORD
HRLORD
Harlingen Valley Intl
Thu 10/8
5:05 am-8:33 pm
2 stops15h 28m
Chicago O'Hare Intl
Sun 10/11
6:25 am-1:23 pm
1 stop6h 58m
$554
Cheapest one-way
HarlingenChicago
HRL - ORD
HRLORD
Harlingen Valley Intl
Wed 8/26
5:18 pm-11:26 pm
1 stop6h 08m
$129
Showing 1-10 of 19 resultsSorted by cheapest first
Best time to book a flight from Harlingen to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Harlingen with our price prediction graph.
HRL-ORD
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Harlingen to Illinois
HRL-USIL
HRL-ORD
What is the cheapest month to book a flight from Harlingen to Illinois?
Currently, October is the cheapest month in which you can book a flight from Harlingen to Illinois (average of $130). Flying from Harlingen to Illinois in March is currently the most expensive (average of $377). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Harlingen to Illinois?
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated June 28, 2026.
Read reviews from past customers who have flown Southwest,United Airlines, andAmerican Airlines from Harlingen to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Harlingen to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
Alternative routes for Harlingen to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Harlingen to Illinois by cabin class
Find flights from Harlingen to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Harlingen and Illinois flights
Browse other Harlingen and Illinois flight options. Last updated on June 28, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Harlingen to Illinois flights
Consider these flights traveling from Harlingen to Illinois.
Top 3 airlines flying from Harlingen to Illinois
Discover the top 3 airlines that operate flights from Harlingen to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$250 | Average$408 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$252 | Average$427 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$318 | Average$438 | FlexibilityNo cancel fee | On-time71% |