HRL - SEA

$200 Find Cheap Flights from Harlingen to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Harlingen to Seattle departing on 4/16. 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 Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harlingen to Seattle, 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 Harlingen to Seattle, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$251
Typical prices: $406-$381
American Airlines
Thu 5/14Tue 5/26
HRL - SEA • 1 stop
Cheapest one-way
$200
Typical prices: $157-$158
Delta
Thu 4/16
HRL - SEA • 1 stop
Top airlines
Cheapest • from $251 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Harlingen and Seattle. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $423 (round-trip)
Shortest trip • 7h 00m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 46% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Harlingen to Seattle (HRL-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Harlingen to Seattle 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 Harlingen to Seattle

Thu, May 14 - Tue, May 26
American Airlines Logo
7:53 pm - 12:44 am
HRL
-
SEA
6h 51m
1 stop
American Airlines Logo
11:24 pm - 10:13 am
SEA
-
HRL
8h 49m
1 stop
$251American Airlines
Thu, May 14 - Tue, May 26
American Airlines Logo
7:53 pm - 12:44 am
HRL
-
SEA
6h 51m
1 stop
American Airlines Logo
11:24 pm - 10:13 am
SEA
-
HRL
8h 49m
1 stop
$277American Airlines
Fri, Apr 24 - Sun, Apr 26
American Airlines Logo
7:53 pm - 12:44 am
HRL
-
SEA
6h 51m
1 stop
American Airlines Logo
12:59 am - 10:17 am
SEA
-
HRL
7h 18m
1 stop
$295American Airlines
Fri, Apr 24 - Fri, May 1
United Airlines Logo
5:18 pm - 11:12 pm
HRL
-
SEA
7h 54m
1 stop
United Airlines Logo
11:59 pm - 11:23 am
SEA
-
HRL
9h 24m
1 stop
$317United Airlines
Thu, May 14 - Mon, May 25
American Airlines Logo
7:53 pm - 12:44 am
HRL
-
SEA
6h 51m
1 stop
American Airlines Logo
11:24 pm - 10:13 am
SEA
-
HRL
8h 49m
1 stop
$321American Airlines
Thu, Jun 4 - Tue, Jun 9
American Airlines Logo
8:04 pm - 12:59 am
HRL
-
SEA
6h 55m
1 stop
American Airlines Logo
11:24 pm - 10:13 am
SEA
-
HRL
8h 49m
1 stop
$329American Airlines
Thu, Jun 4 - Tue, Jun 9
American Airlines Logo
4:57 pm - 12:59 am
HRL
-
SEA
10h 02m
1 stop
American Airlines Logo
11:24 pm - 10:13 am
SEA
-
HRL
8h 49m
1 stop
$334American Airlines
Wed, Apr 8 - Mon, Apr 13
American Airlines Logo
6:00 am - 10:48 am
HRL
-
SEA
6h 48m
1 stop
American Airlines Logo
12:59 am - 10:17 am
SEA
-
HRL
7h 18m
1 stop
$354American Airlines
Wed, Apr 29 - Sat, May 2
United Airlines Logo
5:18 pm - 11:12 pm
HRL
-
SEA
7h 54m
1 stop
United Airlines Logo
5:05 am - 8:00 pm
SEA
-
HRL
12h 55m
2 stops
$356United Airlines
Wed, Apr 29 - Sat, May 2
United Airlines Logo
12:05 pm - 9:46 pm
HRL
-
SEA
11h 41m
2 stops
United Airlines Logo
5:05 am - 8:00 pm
SEA
-
HRL
12h 55m
2 stops
$361United Airlines
Booking Insights

KAYAK's insights & trends for Harlingen to Seattle flights

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

How much is a round-trip flight from Harlingen, Texas to Seattle?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Harlingen, Texas to Seattle departing in May.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Harlingen to Seattle, 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 Harlingen to Seattle is February, where tickets cost $250 (return) on average. On the other hand, the most expensive months are April and January, where the average cost of round-trip tickets is $626 and $604 respectively.

Good to know

Low seasonSeptember
Cheapest flight$200
Best time to beat the crowds but there is an average 25% increase in price.
Most popular time to fly with an average 29% increase in price.
Flight from Harlingen to Seattle

When to book flights from Harlingen to Seattle

Are your dates flexible? Find out the best times to travel from Harlingen to Seattle 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 Harlingen to Seattle

  • What is the cheapest flight from Harlingen to Seattle?

    In the last 3 days, the lowest price for a flight from Harlingen to Seattle was $200 for a one-way ticket and $251 for a round-trip.

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

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

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

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

  • Which airline alliances offer flights from Harlingen to Seattle?

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

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

    The two airlines most popular with KAYAK users for flights from Harlingen to Seattle are Southwest and United Airlines. With an average price for the route of $603 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 $468 and an overall rating of 7.4.

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

    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 Harlingen to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Harlingen 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 Harlingen to Seattle?

    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 Seattle with an airline and back to Harlingen with another airline. Booking your flights between Harlingen and SEA 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 Harlingen to Seattle?

    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 Seattle from Harlingen 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 Harlingen to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Harlingen to Seattle. 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 Harlingen to Seattle? 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 4333 reviews
7.0Food
8.0Comfort
8.1Boarding
7.5Entertainment
8.6Crew
Airline reviews

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

2.0 MediocreStuart, Mar 2026
HOU - STL
Read more Southwest reviews

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

Southwest continues to do less for more money. Flight attendants used to be fun and friendly. But now it’s like they don’t even see you. Such a shame.

Great flight. Good snacks and drinks. Grateful it was free. The flight from Nashville to louisville, i think her name was Tracy (not sure that's right) super awesome, nice and cheerful. She really enjoyed being at work today! She was the person who scanned the boarding pass on flight wn941. She should be recommended for a raise !

I liked it better when you were truer to your roots Am paying more for less fun

I elected to pay for the upgrades and found very little difference

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

I was assigned seat 7E, yet my boarding was Group 5, which caused me to have to put my luggage in the back of the plance above `19 or 20 aisle, as passengers who had boarded earlier took the overhead bins in the front. SW needs to monitor bin space and ensure that bin space above the seat are aligned to those sitting near their seats. Also the seating assignments needs to align with group number. Maybe board those last first and so on? Having said the ALL the passengers on the plane were gracious enough to allow me and other passengers in this dilema to retrieve our luggage and helped us along the way. I always love the flight staff, as always their fantastic and I can't rave about them enough!

Paid for premium extra leg room but the bin space for rows 1-3 had to go in rows 4-6 and 4-6 had to go to 7-9 because flight attendants have snacks and their luggage upfront. So we pay extra to have to fight thru traffic to get our bags. Only 2nd day of new seating so hope they fix this.

Great vacation. Can't wait till next year for another one.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

I've been flying American mostly, and it's been very frustrating. This united flight makes me realize maybe the issue isn't flying, but the airline. United was a significantly better experience. The plane was more comfortable, with a normal amount of leg room (vs the ridiculous reductions AA has made), more comfortable seats, screens to watch movies. It was a much better experience!

We had excellent customer service despite the chaos at George Bush airport in Houston!

It isvvery small flight. No leg room . No space to put my personal item at feet.

Overall we had a good experience during our flight from San Francisco to Houston.

Airport terminal was outdated, flight was on a small jet with no wifi

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.

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

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

I like flying first class, and United has a nice one

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

The flight changed gates multiple times and flight had to be delayed multiple times

Delayed for mechanical and no updates on what was happening and how long the delay might be.

On the return flight, arriving in Denver we sat on the tarmac in Denver for over 20 minutes.

Absolutely terrible. Would never fly American again. 2 deplaned incidents and delayed by close to 24 hours. $12 meal voucher for first class passengers was an insult to the injury. Pathetic.

Mostly good. The WiFi wasn’t working so that was not great.

I rated the experience "mediocre" because of the 2 hour delay in take off. This is the 4th flight from DFW on AA where there was a delay and in one of the instances (after 13 delays), the flight was cancelled. I understand weather but for the March 18th flight, there was no weather issue in Dallas or Detroit. I called Concierge Key and they were wonderful, booking me on a later flight in case my flight was cancelled. I have flown with American for many years and never has there been this consistent pattern of delays. Very disappointing.

As a first class customer, there was no power the entire flight which limited my ability to work. I find this unacceptable. The first 11 rows on the left side of the plan were out. I was only offered the option to charge my phone which was not the issue because my laptop was out of power. I asked if there was anything that can be done for me, and the answer was, "no". I was not offered any type of compensation for this AA problem which caused me unnecessary stress due to inability to address business issues on an already challenging travel day. Flight attendants tried to reset the power once but that was the extent of their support. Very disappointing for the lack of expected services on a flight. Please contact me with customer focused response to this complaint.

Easy boarding. Rows are smaller but that may be an older and bigger me now :)

Check in was rough because the check in crew did not know how to manage my international visa documents. Required a long process and 4 people to finally be able to proceed to security. They told us incorrect information several times before acknowledging we did indeed have everything we needed from the start.

Poor communication ahead of time about flight delays and old planes/other equipment.

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

Information on your arrival and departure airports