SEA - HRL

$197 Find Cheap Flights from Seattle to Harlingen

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Harlingen departing on 2/3. 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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Everything you should know

Cheapest round-trip
$197
American Airlines
Tue 2/3Wed 2/4
SEA - HRL • 1 stop
Cheapest one-way
Multiple Airlines
Thu 12/18
SEA - HRL • multi-stop
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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

Tue, Feb 3 - Wed, Feb 4
American Airlines Logo
6:00 am - 2:46 pm
SEA
-
HRL
6h 46m1 stop
American Airlines Logo
11:06 am - 5:45 pm
HRL
-
SEA
8h 39m1 stop
$197American Airlines
Thu, Jan 22 - Thu, Jan 29
American Airlines Logo
11:12 pm - 10:36 am
SEA
-
HRL
9h 24m1 stop
American Airlines Logo
11:06 am - 5:45 pm
HRL
-
SEA
8h 39m1 stop
$216American Airlines
Tue, Feb 3 - Wed, Feb 4
American Airlines Logo
10:00 am - 11:21 pm
SEA
-
HRL
11h 21m2 stops
American Airlines Logo
11:06 am - 5:45 pm
HRL
-
SEA
8h 39m1 stop
$231American Airlines
Sun, Jan 11 - Wed, Jan 14
American Airlines Logo
7:35 am - 6:14 pm
SEA
-
HRL
8h 39m1 stop
American Airlines Logo
6:02 am - 11:01 am
HRL
-
SEA
6h 59m1 stop
$241American Airlines
Tue, Feb 3 - Wed, Feb 4
United Airlines Logo
9:00 am - 9:59 pm
SEA
-
HRL
10h 59m2 stops
United Airlines Logo
12:10 pm - 9:12 pm
HRL
-
SEA
11h 02m2 stops
$247United Airlines
Thu, Jan 22 - Thu, Jan 29
United Airlines Logo
12:57 pm - 9:59 pm
SEA
-
HRL
7h 02m1 stop
United Airlines Logo
9:20 am - 9:12 pm
HRL
-
SEA
13h 52m2 stops
$262United Airlines
Thu, Jan 22 - Thu, Jan 29
United Airlines Logo
8:40 am - 9:59 pm
SEA
-
HRL
11h 19m2 stops
United Airlines Logo
12:10 pm - 9:12 pm
HRL
-
SEA
11h 02m2 stops
$267United Airlines
Sun, Jan 11 - Wed, Jan 14
American Airlines Logo
6:00 am - 6:14 pm
SEA
-
HRL
10h 14m2 stops
American Airlines Logo
6:02 am - 11:01 am
HRL
-
SEA
6h 59m1 stop
$294American Airlines
Tue, Jan 27 - Sat, Jan 31
United Airlines Logo
12:57 pm - 9:59 pm
SEA
-
HRL
7h 02m1 stop
United Airlines Logo
9:20 am - 9:15 pm
HRL
-
SEA
13h 55m2 stops
$332United Airlines
Tue, Jan 27 - Sat, Jan 31
United Airlines Logo
9:00 am - 9:59 pm
SEA
-
HRL
10h 59m2 stops
United Airlines Logo
9:20 am - 9:12 pm
HRL
-
SEA
13h 52m2 stops
$337United 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.

What’s the cheapest day of the week to fly from Seattle to Harlingen?

The average price of all round-trip flights from Seattle to Harlingen clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Harlingen on a Thursday and more expensive on a Monday. On your return trip to Seattle, you should consider flying back on a Thursday, and avoid Saturdays for better deals.

Good to know

Cheapest flight$197
Most popular time to fly and prices are also 30% 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 $197 for a round-trip ticket.

  • 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 $497 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 $389 and an overall rating of 7.2.

  • 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 9091 reviews
7.3Comfort
6.6Food
7.7Boarding
8.1Crew
7.1Entertainment
Airline reviews

Ot was overall fine. Left on time and had basic snacks. Weather was finicky but that’s not the airlines fault.

8.0 ExcellentAnonymous, Nov 2025
BTR - IAH
Read more United Airlines reviews

Ot was overall fine. Left on time and had basic snacks. Weather was finicky but that’s not the airlines fault.

Even though we were delayed, we were able to make our connection

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Crew and customer service were excellent. This flight also had plenty of leg room and seat mounted screens for entertainment. A very pleasant flight all around!

I was in first class. The outlets at my seat did not work. The plane was shabby and run down. I had prepurchsed a day subscription for internet that was not redeemable. I had to repurchase the internet for my flight and then it didn’t work anyway. Quite disappointed in what was supposed to be the launch of a great vacation.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

This flight was perfect. No complaints and only the highest regard for the crew and ground staff and how they executed perfectly. I fly a lot with United and would request predictability and transparency in their operations instead of last minute changes.

The boarding was as always, the crew tried their best but not enough. The food was a disaster I had dietary restrictions that were half met because the company did not loaded the food for the flight. The entertainment screen was fine but content was not and also they removed the free messaging option from the flight and they charged 30 dollars for that crappy bandwidth. This flight is not worth the cost and the company is going down on quality.

A little late at the start but all worked out well.

I liked the humor of the captain and crew on the flight from Flagstaff to Dallas. They were humorous.

After arriving in Dallas, the aircraft taxied for an unusually long time and was unable to park at the gate, which caused a significant delay and made me miss my connecting flight. I then had to wait in a very long line to be rebooked, and I was told that no hotel or meal accommodations would be provided. What is even more unacceptable is that my luggage was mishandled and has still not been located. My suitcase contains important medications that I urgently need, and I have been unable to access them due to the airline’s mishandling. This situation has caused me considerable stress and inconvenience, and I need this issue to be resolved immediately.

I appreciated that it was on time, safe and professional. I didn’t like that I wasn’t in a place where I had a window at my window seat. It would have been nice to know that in advance. If it was mentioned in the ticketing, I didn’t notice it.

I have a gluten allergy so didn't have any food

Baggage handling poor. Second time this has happened. My bag went to San Francisco instead of Fiji. No apology. Luckily Nadi airport staff are fantastic. My bag arrived in Fiji the next day.

Wish a flight with more than 2 hours with some snack rather than just cookie/biscuit.

Flight delayed and missed connection. Rescheduled flight cancelled after 6 hrs wait. Rerouted thru ORD, flight cancelled, overnight stay in ORD. Still in the air on new flight!

Delayed delayed delayed and no offer for food or vouchers

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

Information on your arrival and departure airports