$96+ Cheap flights from Harlingen to St. Louis (HRL - STL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — STL
Nov 8 — Nov 151
Round-trip
1 adult, Economy
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Find cheap flights from Harlingen to St. Louis 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 St. Louis
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One-way
Cheapest flights from Harlingen to St. LouisExplore the most affordable flight options available from Harlingen to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 9, 2026.
Explore the most affordable flight options available from Harlingen to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 9, 2026.
This Southwest deal was found by Cheapflights users on 10/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1611:35 am -
1 stop4h 00m
Wed 12/305:05 am -
1 stop4h 00m
Deal found 10/7![Southwest logo]()
$191
This Southwest deal was found by Cheapflights users on 10/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1611:35 am -
1 stop5h 50m
Thu 12/315:00 pm -
1 stop4h 45m
Deal found 10/7![Southwest logo]()
$238
This Southwest deal was found by Cheapflights users on 10/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/213:40 pm -
2 stops8h 30m
Wed 12/305:05 am -
1 stop4h 00m
Deal found 10/7![Southwest logo]()
$243
This United Airlines deal was found by Cheapflights users on 10/5. 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 12/162:00 pm -
2 stops8h 59m
Fri 1/16:15 am -
1 stop7h 15m
Deal found 10/5![United Airlines logo]()
$251
This Southwest deal was found by Cheapflights users on 10/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1611:35 am -
1 stop5h 50m
Fri 1/18:25 am -
2 stops7h 25m
Deal found 10/7![Southwest logo]()
$265
This American Airlines deal was found by Cheapflights users on 10/7. 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.
Wed 12/166:41 pm -
1 stop4h 53m
Fri 1/15:00 am -
1 stop5h 04m
Deal found 10/7![American Airlines logo]()
$301
This Southwest deal was found by Cheapflights users on 10/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/223:40 pm -
2 stops8h 30m
Tue 12/295:05 am -
1 stop4h 00m
Deal found 10/5![Southwest logo]()
$337
Best flights from Harlingen to St. LouisDiscover carefully curated flight deals from Harlingen to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 9, 2026.
Discover carefully curated flight deals from Harlingen to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 9, 2026.
This Southwest deal was found by Cheapflights users on 10/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1611:35 am -
1 stop4h 00m
Wed 12/305:05 am -
1 stop4h 00m
Deal found 10/7![Southwest logo]()
$191
This American Airlines deal was found by Cheapflights users on 10/5. 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.
Wed 12/166:41 pm -
1 stop4h 53m
Fri 1/15:00 am -
1 stop5h 04m
Deal found 10/5![American Airlines logo]()
$307
This United Airlines deal was found by Cheapflights users on 10/6. 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 12/1612:00 pm -
2 stops10h 59m
Fri 1/16:15 am -
1 stop7h 15m
Deal found 10/6![United Airlines logo]()
$350
This Southwest deal was found by Cheapflights users on 10/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/213:40 pm -
1 stop6h 50m
Wed 12/305:05 am -
1 stop4h 00m
Deal found 10/7![Southwest logo]()
$238
This Southwest deal was found by Cheapflights users on 10/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1611:35 am -
1 stop5h 50m
Fri 1/18:25 am -
2 stops7h 25m
Deal found 10/7![Southwest logo]()
$265
This Southwest deal was found by Cheapflights users on 10/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/223:40 pm -
1 stop6h 50m
Tue 12/295:05 am -
1 stop4h 00m
Deal found 10/5![Southwest logo]()
$332
Last-minute flights from Harlingen to St. LouisDiscover last-minute flight deals from Harlingen to St. Louis. Data last updated October 9, 2026 and is based on user searches.
Discover last-minute flight deals from Harlingen to St. Louis. Data last updated October 9, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 10/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/134:35 pm -
1 stop3h 40m
Tue 10/205:20 pm -
1 stop4h 40m
Deal found 10/8![Southwest logo]()
$453
This Southwest deal was found by Cheapflights users on 10/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/131:00 pm -
2 stops6h 55m
Wed 10/146:00 am -
2 stops6h 25m
Deal found 10/6![Southwest logo]()
$479
This American Airlines deal was found by Cheapflights users on 10/4. 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 10/196:42 pm -
1 stop5h 00m
Fri 10/235:40 am -
1 stop4h 28m
Deal found 10/4![American Airlines logo]()
$399
This Southwest deal was found by Cheapflights users on 10/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:30 pm -
1 stop4h 00m
Fri 10/235:25 am -
2 stops6h 50m
Deal found 10/4![Southwest logo]()
$434
This Southwest deal was found by Cheapflights users on 10/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/214:35 pm -
1 stop3h 40m
Sun 10/255:00 am -
1 stop7h 00m
Deal found 10/6![Southwest logo]()
$422
This American Airlines deal was found by Cheapflights users on 10/8. 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.
Sat 11/216:46 pm -
1 stop4h 49m
Mon 11/305:00 am -
1 stop5h 10m
Deal found 10/8![American Airlines logo]()
$419
This Southwest deal was found by Cheapflights users on 10/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2112:50 pm -
2 stops6h 20m
Mon 11/305:05 am -
1 stop4h 00m
Deal found 10/8![Southwest logo]()
$478
One-way flights from Harlingen to St. LouisSearch for one-way flight options from Harlingen to St. Louis. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.
Search for one-way flight options from Harlingen to St. Louis. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.
This Southwest deal was found by Cheapflights users on 10/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/412:50 pm -
1 stop3h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Southwest logo]()
$96
This United Airlines deal was found by Cheapflights users on 10/7. 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 10/285:05 am -
1 stop4h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![United Airlines logo]()
$159
This American Airlines deal was found by Cheapflights users on 10/5. 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.
Wed 10/282:46 pm -
1 stop4h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![American Airlines logo]()
$165
This Southwest deal was found by Cheapflights users on 10/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:05 pm -
1 stop5h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Southwest logo]()
$193
This American Airlines deal was found by Cheapflights users on 10/5. 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.
Wed 10/142:46 pm -
1 stop7h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![American Airlines logo]()
$227
This United Airlines deal was found by Cheapflights users on 10/5. 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 10/145:05 am -
2 stops9h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![United Airlines logo]()
$232
Find flight deals from Harlingen to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Harlingen (HRL) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $191 (Southwest) |
One-way from | $96 (Southwest) |
Cheapflights Fare Finder
Customize your flight search to find flights from Harlingen to St. Louis 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 7,457,451 searches. Data last updated October 9, 2026.
Use the filters below to find and compare flights from Harlingen to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
HarlingenSt. Louis
HRL Harlingen Valley Intl - STL Lambert-St Louis
HRLSTL
Harlingen Valley Intl
Wed 11/4
12:50 pm-4:45 pm
1 stop3h 55m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$96
HarlingenSt. Louis
HRL Harlingen Valley Intl - STL Lambert-St Louis
HRLSTL
Harlingen Valley Intl
Wed 10/28
5:05 am-10:02 am
1 stop4h 57m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$159
HarlingenSt. Louis
HRL Harlingen Valley Intl - STL Lambert-St Louis
HRLSTL
Harlingen Valley Intl
Wed 10/28
2:46 pm-10:00 pm
1 stop7h 14m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$176
HarlingenSt. Louis
HRL Harlingen Valley Intl - STL Lambert-St Louis
HRLSTL
Harlingen Valley Intl
Wed 12/16
11:35 am-3:35 pm
1 stop4h 00m
Lambert-St Louis
Wed 12/30
5:05 am-9:05 am
1 stop4h 00m
$191
HarlingenSt. Louis
HRL Harlingen Valley Intl - STL Lambert-St Louis
HRLSTL
Harlingen Valley Intl
Wed 10/14
2:46 pm-9:59 pm
1 stop7h 13m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$227
HarlingenSt. Louis
HRL Harlingen Valley Intl - STL Lambert-St Louis
HRLSTL
Harlingen Valley Intl
Wed 10/14
5:05 am-2:17 pm
2 stops9h 12m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$232
HarlingenSt. Louis
HRL Harlingen Valley Intl - STL Lambert-St Louis
HRLSTL
Harlingen Valley Intl
Mon 12/21
3:40 pm-10:30 pm
1 stop6h 50m
Lambert-St Louis
Wed 12/30
5:05 am-9:05 am
1 stop4h 00m
$238
HarlingenSt. Louis
HRL Harlingen Valley Intl - STL Lambert-St Louis
HRLSTL
Harlingen Valley Intl
Wed 12/16
11:35 am-5:25 pm
1 stop5h 50m
Lambert-St Louis
Fri 1/1
8:25 am-3:50 pm
2 stops7h 25m
$265
HarlingenSt. Louis
HRL Harlingen Valley Intl - STL Lambert-St Louis
HRLSTL
Harlingen Valley Intl
Wed 12/16
6:41 pm-11:34 pm
1 stop4h 53m
Lambert-St Louis
Fri 1/1
5:00 am-10:04 am
1 stop5h 04m
$307
HarlingenSt. Louis
HRL Harlingen Valley Intl - STL Lambert-St Louis
HRLSTL
Harlingen Valley Intl
Wed 11/4
5:25 pm-12:10 pm
3 stops18h 45m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$330
Showing 1-10 of 12 resultsSorted by cheapest first
Compare providers for flights from Harlingen to St. Louis
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Harlingen to St. Louis in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Harlingen-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harlingen-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harlingen-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Harlingen-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Harlingen-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Harlingen to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Harlingen with our price prediction graph.
HRL-STL
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.
Related info for your journey
Find useful and relevant information for your journey from Harlingen to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsFairview Heights
O'Fallon
Fenton
Swansea
Eureka
Wentzville
Chesterfield
Maryland Heights
Collinsville
Edwardsville
Glencoe
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