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Cheap flights from Seattle to Harlingen from $114

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 3/4. 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.
American Airlines Logo
12:59 am - 10:12 am
SEA
-
HRL
7h 13m
1 stop
American Airlines Logo
8:06 pm - 12:55 am
HRL
-
SEA
6h 49m
1 stop
$217American Airlines
mar., mars 10 - mer., mars 18
United Airlines Logo
6:45 am - 4:04 pm
SEA
-
HRL
7h 19m
1 stop
United Airlines Logo
12:10 pm - 7:25 pm
HRL
-
SEA
9h 15m
1 stop
$237United Airlines
mar., mars 10 - mar., mars 17
United Airlines Logo
8:51 am - 9:59 pm
SEA
-
HRL
11h 08m
2 stops
United Airlines Logo
12:10 pm - 7:44 pm
HRL
-
SEA
9h 34m
1 stop
$256United Airlines
sam., mai 2 - mar., mai 5
United Airlines Logo
8:51 am - 9:59 pm
SEA
-
HRL
11h 08m
2 stops
United Airlines Logo
9:20 am - 6:32 pm
HRL
-
SEA
11h 12m
2 stops
$261United Airlines
sam., mai 2 - mar., mai 5
American Airlines Logo
2:18 pm - 10:53 pm
SEA
-
HRL
6h 35m
1 stop
American Airlines Logo
2:36 pm - 11:04 pm
HRL
-
SEA
10h 28m
2 stops
$263American Airlines
mar., mars 10 - mar., mars 17
American Airlines Logo
10:25 am - 7:33 pm
SEA
-
HRL
7h 08m
1 stop
American Airlines Logo
2:47 pm - 9:22 pm
HRL
-
SEA
8h 35m
1 stop
$265American Airlines
sam., mai 2 - mar., mai 5
American Airlines Logo
11:55 pm - 10:17 am
SEA
-
HRL
8h 22m
1 stop
American Airlines Logo
7:53 pm - 12:44 am
HRL
-
SEA
6h 51m
1 stop
$286American Airlines
lun., avr. 13 - jeu., avr. 23
American Airlines Logo
12:59 am - 10:12 am
SEA
-
HRL
7h 13m
1 stop
American Airlines Logo
8:06 pm - 12:55 am
HRL
-
SEA
6h 49m
1 stop
$287American Airlines
mar., mars 3 - dim., mars 8
American Airlines Logo
12:59 am - 10:12 am
SEA
-
HRL
7h 13m
1 stop
American Airlines Logo
8:06 pm - 12:55 am
HRL
-
SEA
6h 49m
1 stop
$288American Airlines
mar., mars 3 - dim., mars 15
American Airlines Logo
11:55 pm - 10:17 am
SEA
-
HRL
8h 22m
1 stop
American Airlines Logo
2:47 pm - 10:47 pm
HRL
-
SEA
10h 00m
1 stop
$292American Airlines
dim., avr. 12 - mer., avr. 22

American Airlines flights from Seattle to Harlingen, Texas

Our best American Airlines deals on Seattle to Harlingen, Texas flight tickets
American Airlines
Mar 10
SEA12:59 amSeattle/Tacoma Intl
7h 13m
1 stop
HRL10:12 amHarlingen Valley Intl
Mar 18
HRL8:06 pmHarlingen Valley Intl
6h 49m
1 stop
SEA12:55 amSeattle/Tacoma Intl
$217
American Airlines
Mar 10
SEA2:18 pmSeattle/Tacoma Intl
6h 35m
1 stop
HRL10:53 pmHarlingen Valley Intl
Mar 17
HRL2:36 pmHarlingen Valley Intl
10h 28m
2 stops
SEA11:04 pmSeattle/Tacoma Intl
$263
American Airlines
May 2
SEA10:25 amSeattle/Tacoma Intl
7h 08m
1 stop
HRL7:33 pmHarlingen Valley Intl
May 5
HRL2:47 pmHarlingen Valley Intl
8h 35m
1 stop
SEA9:22 pmSeattle/Tacoma Intl
$265

United Airlines flights from Seattle to Harlingen, Texas

Our best United Airlines deals on Seattle to Harlingen, Texas flight tickets
United Airlines
Mar 10
SEA6:45 amSeattle/Tacoma Intl
7h 19m
1 stop
HRL4:04 pmHarlingen Valley Intl
Mar 17
HRL12:10 pmHarlingen Valley Intl
9h 15m
1 stop
SEA7:25 pmSeattle/Tacoma Intl
$237
United Airlines
May 2
SEA8:51 amSeattle/Tacoma Intl
11h 08m
2 stops
HRL9:59 pmHarlingen Valley Intl
May 5
HRL12:10 pmHarlingen Valley Intl
9h 34m
1 stop
SEA7:44 pmSeattle/Tacoma Intl
$256
United Airlines
May 2
SEA8:51 amSeattle/Tacoma Intl
11h 08m
2 stops
HRL9:59 pmHarlingen Valley Intl
May 5
HRL9:20 amHarlingen Valley Intl
11h 12m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$261

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 février 12, 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

mar. 3/10

12:59 am-10:12 am

1 stop7h 13m

Harlingen Valley Intl

mer. 3/18

8:06 pm-12:55 am

1 stop6h 49m

$217

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

mar. 3/10

6:45 am-4:04 pm

1 stop7h 19m

Harlingen Valley Intl

mar. 3/17

12:10 pm-7:25 pm

1 stop9h 15m

$237

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

sam. 5/2

8:51 am-9:59 pm

2 stops11h 08m

Harlingen Valley Intl

mar. 5/5

12:10 pm-7:44 pm

1 stop9h 34m

$256

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

sam. 5/2

8:51 am-9:59 pm

2 stops11h 08m

Harlingen Valley Intl

mar. 5/5

9:20 am-6:32 pm

2 stops11h 12m

$261

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

mar. 3/10

2:18 pm-10:53 pm

1 stop6h 35m

Harlingen Valley Intl

mar. 3/17

2:36 pm-11:04 pm

2 stops10h 28m

$263

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

sam. 5/2

10:25 am-7:33 pm

1 stop7h 08m

Harlingen Valley Intl

mar. 5/5

2:47 pm-9:22 pm

1 stop8h 35m

$265

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

lun. 4/13

11:55 pm-10:17 am

1 stop8h 22m

Harlingen Valley Intl

jeu. 4/23

7:53 pm-12:44 am

1 stop6h 51m

$286

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

mar. 3/3

12:59 am-10:12 am

1 stop7h 13m

Harlingen Valley Intl

dim. 3/8

8:06 pm-12:55 am

1 stop6h 49m

$287

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

mar. 3/3

12:59 am-10:12 am

1 stop7h 13m

Harlingen Valley Intl

dim. 3/15

8:06 pm-12:55 am

1 stop6h 49m

$288

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

dim. 4/12

11:55 pm-10:17 am

1 stop8h 22m

Harlingen Valley Intl

mer. 4/22

2:47 pm-10:47 pm

1 stop10h 00m

$292

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Harlingen from

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 52% 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 34m

Direct flights

None
The fastest flight from Seattle to Harlingen, Texas takes 7h 34m
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 34m.

  • 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
11,267 reviews
Search American Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
9,276 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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