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Cheap flights from Seattle to Harlingen from $175

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 7/28. 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
0 bags

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Find the cheapest flights from Seattle to Harlingen

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
8:51 am - 8:00 pm
SEA
-
HRL
9h 09m
2 stops
United Airlines Logo
9:20 am - 7:54 pm
HRL
-
SEA
12h 34m
2 stops
$247United Airlines
Sat, May 9 - Tue, May 12
United Airlines Logo
8:45 am - 9:59 pm
SEA
-
HRL
11h 14m
2 stops
United Airlines Logo
12:10 pm - 7:44 pm
HRL
-
SEA
9h 34m
1 stop
$302United Airlines
Sat, May 9 - Tue, May 12
American Airlines Logo
12:59 am - 10:12 am
SEA
-
HRL
7h 13m
1 stop
American Airlines Logo
2:36 pm - 9:16 pm
HRL
-
SEA
8h 40m
1 stop
$303American Airlines
Wed, Mar 11 - Tue, Mar 24
United Airlines Logo
11:59 pm - 11:16 am
SEA
-
HRL
9h 17m
1 stop
United Airlines Logo
5:25 pm - 10:59 pm
HRL
-
SEA
7h 34m
1 stop
$327United Airlines
Mon, Mar 9 - Wed, Mar 25
United Airlines Logo
11:59 pm - 11:16 am
SEA
-
HRL
9h 17m
1 stop
United Airlines Logo
9:20 am - 11:16 pm
HRL
-
SEA
15h 56m
2 stops
$332United Airlines
Mon, Mar 9 - Tue, Mar 24
United Airlines Logo
7:35 pm - 11:16 am
SEA
-
HRL
13h 41m
2 stops
United Airlines Logo
12:10 pm - 11:16 pm
HRL
-
SEA
13h 06m
2 stops
$337United Airlines
Mon, Mar 9 - Tue, Mar 24
United Airlines Logo
7:00 am - 9:59 pm
SEA
-
HRL
12h 59m
2 stops
United Airlines Logo
9:20 am - 9:01 pm
HRL
-
SEA
13h 41m
2 stops
$338United Airlines
Wed, Feb 25 - Tue, Mar 3
American Airlines Logo
12:59 am - 10:12 am
SEA
-
HRL
7h 13m
1 stop
American Airlines Logo
10:42 am - 6:53 pm
HRL
-
SEA
10h 11m
2 stops
$341American Airlines
Wed, Mar 11 - Tue, Mar 24
Southwest Logo
5:30 am - 5:50 pm
SEA
-
HRL
10h 20m
2 stops
Southwest Logo
5:05 pm - 12:40 am
HRL
-
SEA
9h 35m
2 stops
$348Southwest
Thu, Mar 12 - Tue, Mar 24
Southwest Logo
5:30 am - 5:25 pm
SEA
-
HRL
9h 55m
2 stops
Southwest Logo
4:40 pm - 11:55 pm
HRL
-
SEA
9h 15m
2 stops
$358Southwest
Fri, Apr 10 - Wed, Apr 15

Southwest flights from Seattle to Harlingen, Texas

Our best Southwest deals on Seattle to Harlingen, Texas flight tickets
Southwest
Mar 12
SEA5:30 amSeattle/Tacoma Intl
10h 20m
2 stops
HRL5:50 pmHarlingen Valley Intl
Mar 24
HRL5:05 pmHarlingen Valley Intl
9h 35m
2 stops
SEA12:40 amSeattle/Tacoma Intl
$348
Southwest
Apr 10
SEA5:30 amSeattle/Tacoma Intl
9h 55m
2 stops
HRL5:25 pmHarlingen Valley Intl
Apr 15
HRL4:40 pmHarlingen Valley Intl
9h 15m
2 stops
SEA11:55 pmSeattle/Tacoma Intl
$358
Southwest
Apr 2
SEA5:30 amSeattle/Tacoma Intl
9h 25m
2 stops
HRL4:55 pmHarlingen Valley Intl
Apr 6
HRL5:30 pmHarlingen Valley Intl
9h 55m
2 stops
SEA1:25 amSeattle/Tacoma Intl
$364

United Airlines flights from Seattle to Harlingen, Texas

Our best United Airlines deals on Seattle to Harlingen, Texas flight tickets
United Airlines
May 9
SEA8:51 amSeattle/Tacoma Intl
9h 09m
2 stops
HRL8:00 pmHarlingen Valley Intl
May 12
HRL9:20 amHarlingen Valley Intl
12h 34m
2 stops
SEA7:54 pmSeattle/Tacoma Intl
$247
United Airlines
May 9
SEA8:45 amSeattle/Tacoma Intl
11h 14m
2 stops
HRL9:59 pmHarlingen Valley Intl
May 12
HRL12:10 pmHarlingen Valley Intl
9h 34m
1 stop
SEA7:44 pmSeattle/Tacoma Intl
$302
United Airlines
Mar 9
SEA11:59 pmSeattle/Tacoma Intl
9h 17m
1 stop
HRL11:16 amHarlingen Valley Intl
Mar 25
HRL5:25 pmHarlingen Valley Intl
7h 34m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
$327

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Harlingen, Texas 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 January 29, 2026.
Use the filters below to find and compare flights from Seattle to Harlingen, Texas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Sat 5/9

8:51 am-8:00 pm

2 stops9h 09m

Harlingen Valley Intl

Tue 5/12

9:20 am-7:54 pm

2 stops12h 34m

$247

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Sat 5/9

8:45 am-9:59 pm

2 stops11h 14m

Harlingen Valley Intl

Tue 5/12

12:10 pm-7:44 pm

1 stop9h 34m

$302

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 3/11

12:59 am-10:12 am

1 stop7h 13m

Harlingen Valley Intl

Tue 3/24

2:36 pm-9:16 pm

1 stop8h 40m

$303

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Mon 3/9

11:59 pm-11:16 am

1 stop9h 17m

Harlingen Valley Intl

Wed 3/25

5:25 pm-10:59 pm

1 stop7h 34m

$327

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Mon 3/9

11:59 pm-11:16 am

1 stop9h 17m

Harlingen Valley Intl

Tue 3/24

9:20 am-11:16 pm

2 stops15h 56m

$332

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Mon 3/9

7:35 pm-11:16 am

2 stops13h 41m

Harlingen Valley Intl

Tue 3/24

12:10 pm-11:16 pm

2 stops13h 06m

$337

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 2/25

7:00 am-9:59 pm

2 stops12h 59m

Harlingen Valley Intl

Tue 3/3

9:20 am-9:01 pm

2 stops13h 41m

$338

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 3/11

12:59 am-10:12 am

1 stop7h 13m

Harlingen Valley Intl

Tue 3/24

10:42 am-6:53 pm

2 stops10h 11m

$341

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 3/12

5:30 am-5:50 pm

2 stops10h 20m

Harlingen Valley Intl

Tue 3/24

5:05 pm-12:40 am

2 stops9h 35m

$348

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Fri 4/10

5:30 am-5:25 pm

2 stops9h 55m

Harlingen Valley Intl

Wed 4/15

4:40 pm-11:55 pm

2 stops9h 15m

$358

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Seattle to Harlingen, Texas

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

Can stopping save me money on Seattle to Harlingen, Texas flights?

You could potentially save up to 56% on your flight if you consider stops on a Seattle to Harlingen, Texas flight.

When to book flights from Seattle to Harlingen, Texas

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

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

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

Fastest flight time

7h 02m

Direct flights

None
The fastest flight from Seattle to Harlingen, Texas takes 7h 02m
There are no direct flights from Seattle to Harlingen, Texas. There are no popular flight routes from Seattle to Harlingen, Texas.
Search flight deals

  • 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 02m.

  • 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, Texas?

Best airlines flying from Seattle to Harlingen, Texas

Compare and see reviews for airlines that fly from Seattle to Harlingen, Texas with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $225Free CancellationRating
7.2
11,205 reviews
Search American Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
9,215 reviews
Search United 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.

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