Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Harlingen from $198

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Harlingen departing on 6/20. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Seattle to Harlingen

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
11:10 am - 8:55 pm
SEA
-
HRL
7h 45m
1 stop
Southwest Logo
5:00 pm - 12:45 am
HRL
-
SEA
9h 45m
2 stops
$359Southwest
Wed, Jul 15 - Wed, Jul 22
United Airlines Logo
12:10 pm - 9:52 pm
SEA
-
HRL
7h 42m
1 stop
United Airlines Logo
5:18 pm - 10:40 pm
HRL
-
SEA
7h 22m
1 stop
$366United Airlines
Tue, Sep 29 - Sat, Oct 3
Southwest Logo
11:05 am - 11:45 pm
SEA
-
HRL
10h 40m
1 stop
Southwest Logo
5:00 pm - 9:45 pm
HRL
-
SEA
6h 45m
1 stop
$367Southwest
Thu, Jul 23 - Tue, Jul 28
United Airlines Logo
8:30 am - 9:52 pm
SEA
-
HRL
11h 22m
2 stops
United Airlines Logo
5:18 pm - 10:40 pm
HRL
-
SEA
7h 22m
1 stop
$371United Airlines
Tue, Sep 29 - Sat, Oct 3
Southwest Logo
11:10 am - 8:55 pm
SEA
-
HRL
7h 45m
1 stop
Southwest Logo
7:05 am - 3:50 pm
HRL
-
SEA
10h 45m
1 stop
$374Southwest
Wed, Jul 15 - Wed, Jul 22
United Airlines Logo
7:00 am - 3:58 pm
SEA
-
HRL
6h 58m
1 stop
United Airlines Logo
5:05 am - 4:14 pm
HRL
-
SEA
13h 09m
2 stops
$376United Airlines
Tue, Sep 29 - Sat, Oct 3
Southwest Logo
5:15 am - 5:00 pm
SEA
-
HRL
9h 45m
2 stops
Southwest Logo
5:00 pm - 9:45 pm
HRL
-
SEA
6h 45m
1 stop
$377Southwest
Thu, Jul 23 - Tue, Jul 28
Southwest Logo
11:05 am - 11:45 pm
SEA
-
HRL
10h 40m
1 stop
Southwest Logo
7:10 am - 4:40 pm
HRL
-
SEA
11h 30m
1 stop
$380Southwest
Thu, Jul 9 - Mon, Jul 13
United Airlines Logo
8:30 am - 9:52 pm
SEA
-
HRL
11h 22m
2 stops
United Airlines Logo
5:05 am - 4:14 pm
HRL
-
SEA
13h 09m
2 stops
$382United Airlines
Tue, Sep 29 - Sat, Oct 3
Southwest Logo
5:15 am - 6:00 pm
SEA
-
HRL
10h 45m
2 stops
Southwest Logo
5:00 pm - 12:45 am
HRL
-
SEA
9h 45m
2 stops
$389Southwest
Wed, Jul 15 - Wed, Jul 22

United Airlines flights from Seattle to Harlingen

Our best United Airlines deals on Seattle to Harlingen flight tickets
United Airlines
Sep 29
SEA12:10 pmSeattle/Tacoma Intl
7h 42m
1 stop
HRL9:52 pmHarlingen Valley Intl
Oct 3
HRL5:18 pmHarlingen Valley Intl
7h 22m
1 stop
SEA10:40 pmSeattle/Tacoma Intl
$366
United Airlines
Sep 29
SEA8:30 amSeattle/Tacoma Intl
11h 22m
2 stops
HRL9:52 pmHarlingen Valley Intl
Oct 3
HRL5:18 pmHarlingen Valley Intl
7h 22m
1 stop
SEA10:40 pmSeattle/Tacoma Intl
$371
United Airlines
Sep 29
SEA7:00 amSeattle/Tacoma Intl
6h 58m
1 stop
HRL3:58 pmHarlingen Valley Intl
Oct 3
HRL5:05 amHarlingen Valley Intl
13h 09m
2 stops
SEA4:14 pmSeattle/Tacoma Intl
$376

American Airlines flights from Seattle to Harlingen

Our best American Airlines deals on Seattle to Harlingen flight tickets
American Airlines
Jun 23
SEA5:10 amSeattle/Tacoma Intl
9h 15m
1 stop
HRL4:25 pmHarlingen Valley Intl
Jun 30
HRL8:04 pmHarlingen Valley Intl
6h 55m
1 stop
SEA12:59 amSeattle/Tacoma Intl
$483
American Airlines
Jun 23
SEA5:10 amSeattle/Tacoma Intl
9h 15m
1 stop
HRL4:25 pmHarlingen Valley Intl
Jun 30
HRL8:04 pmHarlingen Valley Intl
6h 55m
1 stop
SEA12:59 amSeattle/Tacoma Intl
$502
American Airlines
Jun 14
SEA12:49 amSeattle/Tacoma Intl
7h 24m
1 stop
HRL10:13 amHarlingen Valley Intl
Jun 19
HRL8:04 pmHarlingen Valley Intl
6h 55m
1 stop
SEA12:59 amSeattle/Tacoma Intl
$508

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Harlingen 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 June 4, 2026.
Use the filters below to find and compare flights from Seattle to Harlingen that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 7/15

11:10 am-8:55 pm

1 stop7h 45m

Harlingen Valley Intl

Wed 7/22

5:00 pm-12:45 am

2 stops9h 45m

$359
Quickest round-trip

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 9/29

12:10 pm-9:52 pm

1 stop7h 42m

Harlingen Valley Intl

Sat 10/3

5:18 pm-10:40 pm

1 stop7h 22m

$366

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 7/23

11:05 am-11:45 pm

1 stop10h 40m

Harlingen Valley Intl

Tue 7/28

5:00 pm-9:45 pm

1 stop6h 45m

$367

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 9/29

8:30 am-9:52 pm

2 stops11h 22m

Harlingen Valley Intl

Sat 10/3

5:18 pm-10:40 pm

1 stop7h 22m

$371

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 7/15

11:10 am-8:55 pm

1 stop7h 45m

Harlingen Valley Intl

Wed 7/22

7:05 am-3:50 pm

1 stop10h 45m

$374

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 9/29

7:00 am-3:58 pm

1 stop6h 58m

Harlingen Valley Intl

Sat 10/3

5:05 am-4:14 pm

2 stops13h 09m

$376

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 7/23

5:15 am-5:00 pm

2 stops9h 45m

Harlingen Valley Intl

Tue 7/28

5:00 pm-9:45 pm

1 stop6h 45m

$377

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 7/9

11:05 am-11:45 pm

1 stop10h 40m

Harlingen Valley Intl

Mon 7/13

7:10 am-4:40 pm

1 stop11h 30m

$380

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 9/29

8:30 am-9:52 pm

2 stops11h 22m

Harlingen Valley Intl

Sat 10/3

5:05 am-4:14 pm

2 stops13h 09m

$382

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 7/15

5:15 am-6:00 pm

2 stops10h 45m

Harlingen Valley Intl

Wed 7/22

5:00 pm-12:45 am

2 stops9h 45m

$389

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

See travel insights to Harlingen from

How to get the cheapest flight ticket from Seattle to Harlingen

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 typical price of a round-trip flight between Seattle and Harlingen?

What is the cheapest month to fly to Harlingen?

If you aren’t able to travel during the month of September, then book flights to Harlingen from Seattle during January instead. Flights to Harlingen in January, while not as cheap as those in September, still average around $341.

Can stopping save me money on Seattle to Harlingen flights?

You could potentially save up to 21% on your flight if you consider stops on a Seattle to Harlingen flight.

When to book flights from Seattle to Harlingen

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Harlingen according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Harlingen (SEA to HRL) flight deals and tips

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

Fastest flight time

7h 42m

Direct flights

None
The fastest flight from Seattle to Harlingen takes 7h 42m
There are no direct flights from Seattle to Harlingen. There are no popular flight routes from Seattle to Harlingen.
Search flight deals

Frequently asked questions about flying from Seattle to Harlingen

  • How far is Seattle/Tacoma Intl to Harlingen Valley Intl by plane?

    Harlingen Valley Intl is 1992.5 mi away from Seattle/Tacoma Intl. By plane, this route typically takes 7h 42m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Harlingen Valley Intl Airport are refreshed on a daily basis.

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

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Harlingen Valley Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Harlingen Valley Intl Airport.

  • What documentation or ID do you need to fly to Harlingen Valley Intl Airport?

    The travel and health documents required for your trip to Harlingen Valley Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Harlingen Valley Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Seattle to Harlingen?

Best airlines flying from Seattle to Harlingen

Compare and see reviews for airlines that fly from Seattle to Harlingen with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $237Free CancellationRating
7.1
11,643 reviews
Search American Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to Harlingen. momondo saves you time and could save you money on your trip.

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

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

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

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

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

Of course. momondo tracks the price of Seattle to Harlingen flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Harlingen trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 7/4
Sat 7/11
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States