Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Harlingen from $237

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Harlingen departing on 10/8. 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

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

American Airlines Logo
11:24 pm - 9:36 amSEA-HRL
8h 12m1 stop
American Airlines Logo
2:50 pm - 9:48 pmHRL-SEA
8h 58m1 stop
$237American Airlines
Find Deal
Wed, Oct 8 - Wed, Oct 15
American Airlines Logo
11:04 am - 11:04 pmSEA-HRL
10h 00m2 stops
American Airlines Logo
4:02 pm - 11:42 pmHRL-SEA
9h 40m1 stop
$293American Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5
Southwest Logo
7:10 am - 6:30 pmSEA-HRL
9h 20m2 stops
Southwest Logo
10:30 am - 6:40 pmHRL-SEA
10h 10m2 stops
$303Southwest
Find Deal
Wed, Oct 29 - Wed, Nov 5
American Airlines Logo
12:59 am - 9:51 amSEA-HRL
6h 52m1 stop
American Airlines Logo
8:04 pm - 12:58 amHRL-SEA
6h 54m1 stop
$308American Airlines
Find Deal
Wed, Nov 5 - Sun, Nov 9
American Airlines Logo
12:59 am - 9:40 amSEA-HRL
6h 41m1 stop
American Airlines Logo
4:09 pm - 11:11 pmHRL-SEA
9h 02m1 stop
$314American Airlines
Find Deal
Thu, Jan 1 - Fri, Jan 9
United Airlines Logo
8:42 am - 11:18 pmSEA-HRL
12h 36m2 stops
United Airlines Logo
5:17 pm - 11:15 pmHRL-SEA
7h 58m1 stop
$332United Airlines
Find Deal
Wed, Oct 8 - Wed, Oct 15
American Airlines Logo
11:34 am - 10:57 pmSEA-HRL
9h 23m1 stop
American Airlines Logo
8:04 pm - 12:58 amHRL-SEA
6h 54m1 stop
$333American Airlines
Find Deal
Thu, Nov 6 - Sun, Nov 9
United Airlines Logo
8:42 am - 11:18 pmSEA-HRL
12h 36m2 stops
United Airlines Logo
5:00 am - 4:24 pmHRL-SEA
13h 24m2 stops
$337United Airlines
Find Deal
Wed, Oct 8 - Wed, Oct 15
American Airlines Logo
11:59 pm - 9:40 amSEA-HRL
7h 41m1 stop
American Airlines Logo
12:07 pm - 7:03 pmHRL-SEA
8h 56m1 stop
$364American Airlines
Find Deal
Fri, Jan 2 - Fri, Jan 9
United Airlines Logo
5:26 pm - 1:19 pmSEA-HRL
17h 53m3 stops
United Airlines Logo
5:00 am - 2:24 pmHRL-SEA
11h 24m2 stops
$416United Airlines
Find Deal
Wed, Oct 8 - Wed, Oct 15

American Airlines flights from Seattle to Harlingen, Texas

Our best American Airlines deals on Seattle to Harlingen, Texas flight tickets
American Airlines
Oct 8
SEA11:24 pmSeattle/Tacoma Intl
8h 12m
1 stop
HRL9:36 amHarlingen Valley Intl
Oct 15
HRL2:50 pmHarlingen Valley Intl
8h 58m
1 stop
SEA9:48 pmSeattle/Tacoma Intl
$237
Find similar
American Airlines
Oct 29
SEA11:04 amSeattle/Tacoma Intl
10h 00m
2 stops
HRL11:04 pmHarlingen Valley Intl
Nov 5
HRL4:02 pmHarlingen Valley Intl
9h 40m
1 stop
SEA11:42 pmSeattle/Tacoma Intl
$293
Find similar
American Airlines
Nov 5
SEA12:59 amSeattle/Tacoma Intl
6h 52m
1 stop
HRL9:51 amHarlingen Valley Intl
Nov 9
HRL8:04 pmHarlingen Valley Intl
6h 54m
1 stop
SEA12:58 amSeattle/Tacoma Intl
$308
Find similar

United Airlines flights from Seattle to Harlingen, Texas

Our best United Airlines deals on Seattle to Harlingen, Texas flight tickets
United Airlines
Oct 8
SEA8:42 amSeattle/Tacoma Intl
12h 36m
2 stops
HRL11:18 pmHarlingen Valley Intl
Oct 15
HRL5:17 pmHarlingen Valley Intl
7h 58m
1 stop
SEA11:15 pmSeattle/Tacoma Intl
$332
Find similar
United Airlines
Oct 8
SEA8:42 amSeattle/Tacoma Intl
12h 36m
2 stops
HRL11:18 pmHarlingen Valley Intl
Oct 15
HRL5:00 amHarlingen Valley Intl
13h 24m
2 stops
SEA4:24 pmSeattle/Tacoma Intl
$337
Find similar
United Airlines
Oct 8
SEA5:26 pmSeattle/Tacoma Intl
17h 53m
3 stops
HRL1:19 pmHarlingen Valley Intl
Oct 15
HRL5:00 amHarlingen Valley Intl
11h 24m
2 stops
SEA2:24 pmSeattle/Tacoma Intl
$416
Find similar

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 September 17, 2025.
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

Wed 10/8

11:24 pm-9:36 am

1 stop8h 12m

Harlingen Valley Intl

Wed 10/15

2:50 pm-9:48 pm

1 stop8h 58m

$237

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 10/29

11:04 am-11:04 pm

2 stops10h 00m

Harlingen Valley Intl

Wed 11/5

4:02 pm-11:42 pm

1 stop9h 40m

$293

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 10/29

7:10 am-6:30 pm

2 stops9h 20m

Harlingen Valley Intl

Wed 11/5

10:30 am-6:40 pm

2 stops10h 10m

$303

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 11/5

12:59 am-9:51 am

1 stop6h 52m

Harlingen Valley Intl

Sun 11/9

8:04 pm-12:58 am

1 stop6h 54m

$308

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 1/1

12:59 am-9:40 am

1 stop6h 41m

Harlingen Valley Intl

Fri 1/9

4:09 pm-11:11 pm

1 stop9h 02m

$314

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 10/8

8:42 am-11:18 pm

2 stops12h 36m

Harlingen Valley Intl

Wed 10/15

5:17 pm-11:15 pm

1 stop7h 58m

$332

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 11/6

11:34 am-10:57 pm

1 stop9h 23m

Harlingen Valley Intl

Sun 11/9

8:04 pm-12:58 am

1 stop6h 54m

$333

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 10/8

8:42 am-11:18 pm

2 stops12h 36m

Harlingen Valley Intl

Wed 10/15

5:00 am-4:24 pm

2 stops13h 24m

$337

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Fri 1/2

11:59 pm-9:40 am

1 stop7h 41m

Harlingen Valley Intl

Fri 1/9

12:07 pm-7:03 pm

1 stop8h 56m

$364

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 10/8

5:26 pm-1:19 pm

3 stops17h 53m

Harlingen Valley Intl

Wed 10/15

5:00 am-2:24 pm

2 stops11h 24m

$416

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

What is the cheapest day to depart on your flight to Harlingen, Texas?

The cheapest day to depart on your flight to Harlingen, Texas is on a Thursday when prices can be found for as low as $402. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Harlingen, Texas for around $873.

What is the cheapest time of day to depart on your flight to Harlingen, Texas?

Our most recent data shows that the best time of day to fly to Harlingen, Texas is at noon. Flights from Seattle to Harlingen, Texas during this time can be as low as $364. Flights in the afternoon are often more expensive with an average ticket price of $636.

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

You could potentially save up to 36% 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

Direct flights

None
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 6h 12m.

  • 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
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
SouthwestPriceFrom $299Free CancellationRating
8.0
4,242 reviews
Search Southwest 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, Texas 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
Fri 10/17
Fri 10/24
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States