SEA - HRL

$334 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 11/4. 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

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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Flights 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, Nov 4 - Sun, Nov 9
Southwest Logo
9:35 am - 9:55 pmSEA-HRL
10h 20m2 stops
Southwest Logo
3:35 pm - 12:05 amHRL-SEA
10h 30m2 stops
$334Southwest
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Tue, Nov 4 - Sun, Nov 9
United Airlines Logo
11:59 pm - 10:59 amSEA-HRL
9h 00m1 stop
United Airlines Logo
7:27 am - 4:15 pmHRL-SEA
10h 48m2 stops
$337United Airlines
Find Deal
Mon, Nov 3 - Sun, Nov 9
American Airlines Logo
1:33 am - 11:39 amSEA-HRL
8h 06m1 stop
American Airlines Logo
8:01 pm - 12:53 amHRL-SEA
6h 52m1 stop
$342American Airlines
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Tue, Nov 4 - Mon, Nov 10
American Airlines Logo
7:46 am - 6:24 pmSEA-HRL
8h 38m1 stop
American Airlines Logo
8:01 pm - 12:53 amHRL-SEA
6h 52m1 stop
$357American Airlines
Find Deal
Mon, Nov 3 - Mon, Nov 10
American Airlines Logo
1:33 am - 11:39 amSEA-HRL
8h 06m1 stop
American Airlines Logo
8:01 pm - 12:53 amHRL-SEA
6h 52m1 stop
$362American Airlines
Find Deal
Wed, Nov 5 - Mon, Nov 10
American Airlines Logo
7:14 pm - 9:40 amSEA-HRL
12h 26m2 stops
American Airlines Logo
8:01 pm - 12:53 amHRL-SEA
6h 52m1 stop
$367American Airlines
Find Deal
Mon, Nov 3 - Mon, Nov 10
Delta Logo
12:40 am - 2:26 pmSEA-HRL
11h 46m1 stop
Delta Logo
3:00 pm - 11:34 pmHRL-SEA
10h 34m1 stop
$374Delta
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Mon, Jul 21 - Tue, Jul 22
American Airlines Logo
12:59 am - 9:37 amSEA-HRL
6h 38m1 stop
American Airlines Logo
7:59 pm - 12:43 amHRL-SEA
6h 44m1 stop
$377American Airlines
Find Deal
Mon, Jul 21 - Tue, Jul 22
American Airlines Logo
12:59 am - 9:37 amSEA-HRL
6h 38m1 stop
American Airlines Logo
7:59 pm - 12:43 amHRL-SEA
6h 44m1 stop
$423American Airlines
Find Deal
Wed, Nov 5 - Sun, Nov 9
United Airlines Logo
11:59 pm - 10:59 amSEA-HRL
9h 00m1 stop
United Airlines Logo
5:15 am - 4:15 pmHRL-SEA
13h 00m2 stops
$427United Airlines
Find Deal
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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.

What is the cheapest month to fly from Seattle to Harlingen?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Harlingen, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Harlingen is March, where tickets cost $307 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is $644 and $636 respectively.

Good to know

Low seasonJanuary
High seasonMay
Cheapest flight$334
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 23% 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 $334 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, oneworld, and SkyTeam are the airline alliances operating flights between Seattle and Harlingen, with SkyTeam being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from Seattle to Harlingen are Southwest and United Airlines. With an average price for the route of $413 and an overall rating of 8.0, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of $526 and an overall rating of 7.4.

  • 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 3 airlines serving 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.
8.0
SouthwestOverall score based on 4279 reviews
8.0Comfort
7.6Entertainment
8.2Boarding
8.6Crew
7.1Food
Airline reviews

I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.

8.0 ExcellentGavin, Jan 2025SEA - DEN
Read more Southwest reviews

I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.

Multiple delays and gate changes. Arrived at final destination 6 hours late. All rental cars had been taken.

The movies using Southwest WiFi kept pausing and I had to restart multiple times.

First, my flight was a usual flight nothing exceptional or unexpected. Over all it was a normal, good flight! Second, your questionaire is wholly lacking in the proper options to which one can answer a question. Often on short flights, there is no food let alone entertainment so why isn't that reflected in your questionaire? A simple "not applicable" would cover that issue appropriately but no, your form arbitrarily enters an answer based on the initial assessment which normally isn't factual. Until you provide an accurate means of assessing flights, I'll no longer be completing of these unimpressive and misleading assessements. Thank you!

Easy to book and to get check in and get on and off.

It seems as though the provisions are even less. Although SWA used to be an economy Airline, that isn't really the case anymore. I paid over $700. for a round trip to Denver and I could have flown just about any airline for the price. The drinks are now in a 6-ounce cup and with ice I'm sure a can would fill more than 2 cups. However, I am very proud of SWA for using paper rather than continuing to contribute to the millions of plastic cups being used each day. I've thought of this fr many years and am so glad to see it come to fruition, if not by only SWA so far.

Service was great, boarding and exiting went smoothly, and the flight was very pleasant.

Everything worked well. Crew was as entertaining as is possible on a plane flight. Southwest still has good legroom:

Crew was great - friendly and helpful with boarding - letting folks know where overhead space was available thus getting us out of the gate on time.

They sent us to an airport way out of our way because they canceled our flight with no reason

Gate agent did not hold flight for connection, provided no assistance to get new flight

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

Smooth boarding process. Early departure, smooth flight, early arrival. The entertainment package has very good recent movie options. The flight crew were friendly and professional.

I don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

Oh my gosh, I loved my experience with United! they made me want to travel more often.

The planes are so dirty! Food crumbs and finger print smudges, Dust over the vents and carpet stains. It’s disgusting.

The bag drop personal were not helpful. There was no food on the flight. Boeing aircraft, lousy as always. Everything else was fine.

Asked several times dairy free options and was ignored. Was told chips was the only thing I could have that I should have put it on my profile “which it is”. Very unprofessional. WiFi didn’t work have the flight. Overall a very bad experience.

Plane still had screens for watching movies. Good selection too.

Flight crew was amazing! I don't like that the Polaris seats are side-by-side.

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

I’m impressed that we were on time in Sacramento after having a late departure in Newark and our made it. The staff was friendly and warm.

5.5 hour delay with no explanation on why, along with no proactive effort to reaccomodate me.

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious.

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious. this return flight not as tasty, but filling.

So awful Unreliable Unfriendly Bad Mad Mean Smelly Hot Late Overbooked Understaffed Expensive Cramped Narcs If they were a fruit they’d be rotten durian

It’s a great flight. Service is good. Staff is awesome.

Boarding on time and fight was early but they didn't let us off the plane on time so we missed our connecting flight to Japan.

DFW-LHR Toilets not kept clean Too cramped. Aisles so narrow crew were constantly banging into people on the aisle seats. Even then, the carts used are reduced width. Other than that it was a decent flight on both legs

Eventless. It was a good flight and good crew. Can’t complaint.

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

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