SEA - HRL

$109 Find Cheap Flights from Seattle to Harlingen

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Harlingen departing on 4/13. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Harlingen

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Harlingen, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Harlingen, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$217
American Airlines
Sat 4/25Thu 4/30
SEA - HRL • 1 stop
Cheapest one-way
$109
American Airlines
Mon 4/13
SEA - HRL • 1 stop
Top airlines
Cheapest • from $217 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Harlingen. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $382 (round-trip)
Shortest trip • 7h 14m (one-way)
Insights
Insights
Insights
Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Harlingen!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Harlingen (SEA-HRL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Harlingen that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Harlingen

Sat, Apr 25 - Thu, Apr 30
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
$217American Airlines
Thu, Apr 30 - Mon, May 4
American Airlines Logo
12:59 am - 10:17 am
SEA
-
HRL
7h 18m
1 stop
American Airlines Logo
7:53 pm - 12:44 am
HRL
-
SEA
6h 51m
1 stop
$241American Airlines
Sat, Apr 25 - Thu, Apr 30
American Airlines Logo
11:11 am - 10:51 pm
SEA
-
HRL
9h 40m
2 stops
American Airlines Logo
7:53 pm - 12:44 am
HRL
-
SEA
6h 51m
1 stop
$319American Airlines
Tue, Apr 14 - Wed, Apr 15
United Airlines Logo
6:30 am - 4:04 pm
SEA
-
HRL
7h 34m
1 stop
United Airlines Logo
5:18 pm - 11:12 pm
HRL
-
SEA
7h 54m
1 stop
$327United Airlines
Sat, Apr 25 - Thu, Apr 30
Southwest Logo
9:00 am - 9:35 pm
SEA
-
HRL
10h 35m
2 stops
Southwest Logo
6:00 pm - 12:55 am
HRL
-
SEA
8h 55m
2 stops
$328Southwest
Tue, Apr 7 - Wed, Apr 15
American Airlines Logo
7:09 am - 6:15 pm
SEA
-
HRL
9h 06m
1 stop
American Airlines Logo
8:03 pm - 12:44 am
HRL
-
SEA
6h 41m
1 stop
$332American Airlines
Tue, Apr 14 - Wed, Apr 15
United Airlines Logo
6:30 am - 4:04 pm
SEA
-
HRL
7h 34m
1 stop
United Airlines Logo
7:00 am - 6:35 pm
HRL
-
SEA
13h 35m
2 stops
$334United Airlines
Tue, Apr 14 - Wed, Apr 15
United Airlines Logo
8:45 am - 9:59 pm
SEA
-
HRL
11h 14m
2 stops
United Airlines Logo
12:05 pm - 9:39 pm
HRL
-
SEA
11h 34m
2 stops
$337United Airlines
Tue, Apr 14 - Wed, Apr 15
United Airlines Logo
6:00 am - 7:40 pm
SEA
-
HRL
11h 40m
2 stops
United Airlines Logo
7:00 am - 6:35 pm
HRL
-
SEA
13h 35m
2 stops
$339United Airlines
Tue, Apr 14 - Wed, Apr 15
United Airlines Logo
6:30 am - 4:04 pm
SEA
-
HRL
7h 34m
1 stop
United Airlines Logo
7:00 am - 6:35 pm
HRL
-
SEA
13h 35m
2 stops
$354United Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Harlingen flights

Get data-powered insights and trends into flights from Seattle to Harlingen to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Seattle to Harlingen?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Seattle to Harlingen were found on American Airlines ($217) and Southwest ($328).

Good to know

Cheapest flight$109
Most popular time to fly and prices are also 20% lower on average.
Flight from Seattle to Harlingen

When to book flights from Seattle to Harlingen

Are your dates flexible? Find out the best times to travel from Seattle to Harlingen based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Harlingen

  • What is the cheapest flight from Seattle to Harlingen?

    In the last 3 days, the lowest price for a flight from Seattle to Harlingen was $109 for a one-way ticket and $217 for a round-trip.

  • Do I need a passport to fly between Seattle and Harlingen?

    No

  • Which aircraft models fly most regularly from Seattle to Harlingen?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Harlingen?

    Star Alliance, and oneworld are the airline alliances operating flights between Seattle and Harlingen, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Seattle to Harlingen, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to Harlingen are United Airlines and American Airlines. With an average price for the route of $583 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $476 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Seattle to Harlingen?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Harlingen.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Harlingen?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Harlingen from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Harlingen?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Harlingen with an airline and back to Seattle with another airline. Booking your flights between Seattle and HRL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Harlingen?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Harlingen from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Seattle to Harlingen

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Harlingen. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Harlingen? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9431 reviews
7.3Comfort
8.1Crew
7.7Boarding
7.1Entertainment
6.6Food
Airline reviews

Everything was on time and service on the flight was great!

10.0 ExcellentAsha, Mar 2026
MIA - IAH
Read more United Airlines reviews

Everything was on time and service on the flight was great!

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Good flight. Efficient boarding and competent flight crew. No problems until we arrived at our destination gate. We were early so there was an aircraft at the gate that had to move before we could pull in. Then, due to the type of aircraft we flew, the cabin door could not be opened until some luggage from the cargo bay was offloaded to preserve center of gravity characteristics. So, that further delayed deplaning. Despite being 20 minutes early on landing, we ended up being 5 to 10 minutes late after all the delays.

This trip did not start off well. The inbound flight was delayed about 20 minutes. Then, after initial onboarding, the passengers had to deplane due to a mechanical problem. That took about 30 minutes to fix and be cleared. Then, reboarding was chaotic. It took a long time to sort passengers and two passengers on standby were ticketed but there was no seat. So, they had to deplane. One of the flight crew was trying to help passengers figure out a place to put their carry-on bags and that took more time. In the end, our scheduled 10:30 am departure did not actually take off until about 12:05 pm CST. The flight itself was long but we got to Houston. Some passengers missed their connecting flights and had to rebook. Not the best of flights I've had.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Everything was great except for the boarding process. Everyone is lining up all at the same time and it’s hard to tell between the groups as they are way too large.

Very old flight - time to retire it for newer airplanes

Do not like the size of the overhead bin. I think staff should monitor the size of suitcases that are being carried on by passengers to ensure they meet the size requirement.

Everything except the food and entertainment. It was a great experience though

Delayed, toilets did not flush, pilot parked to far away from Gate

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

Where do I start!! I was delayed with my flight from Dallas to Tampa. On the way back from Tampa to Dallas the flight was delayed over 4 hours+. I was put on another flight that was also delayed but not as long. Traveling on American Airlines is becoming exhausing.

Dloght delayed by 2.5 hrs . Common theme in my last four american floghts

The flight attendants and the service is getting worse by the day.

They are rarely on time! Very hard to plan your travels when flights or connections keep getting delayed.

Forced to check bags. Crew uninterested in collecting trash. Unclean seats.

Mediocre would be best description. Food bland. Seat biz class uncomfortable to sleep. Crew never dimmed lights completely in an overnight flight to Europe. Would avoid AA if possible.

Massimo, flight attendant was very authentic, attentive - wonderful. Food/wrap was just okay.

I am an AA flyer for a very long time... AA has yet to disappoint.

Arriving plane went to wrong gate. Flight Attendant was late. Was in no Hurry when he arrived. Flight was fine. Plane had to wait 20 minutes to get assigned a gate due to designated gate tied up. barely connected.. Boarded extremely late on final leg of trip.

Everything you need to know for your flight from Seattle to Harlingen

Information on your arrival and departure airports