255 € Cheap Flights from Harlingen to Seattle

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Flight deals from Harlingen Airport to Seattle

Looking for a cheap last-minute deal or the best return flight from Harlingen Airport to Seattle? If you want to travel next month, return fares start from 370 €. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Harlingen to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Harlingen to Seattle flights are currently cheapest in May.

Harlingen to Seattle: Flight information

The things to know before you go.
Cheapest flight found255 €
Cheapest month to flyMay

Finding cheap flights from Harlingen to Seattle: Frequently asked questions

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.
The best price we found for a return flight from Harlingen to Seattle is 255 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Harlingen to Seattle. But we found flights with one or more stops from 255 €.
As of March 2026, there are no flights flying from Harlingen to Seattle.
The cheapest month to fly from Harlingen to Seattle is usually May.
If you're flying from Harlingen Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the centre of Seattle. We've found flights into this airport from 255 €.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Harlingen Airport to Seattle on Wednesday, 13 May 2026.
No airlines currently offer direct flights between Harlingen Airport and Seattle. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Seattle but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.
In March, the average temperature is usually around 6°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.
Currently, Southwest Airlines offers the cheapest flight tickets to Seattle.

Flying from Valley International Airport (HRL) to Seattle: what you need to know

  • The timezone in Seattle is UTC-7. The city is two hours behind Harlingen, where Valley International Airport is located.

  • Give yourself plenty of time to make your HRL to Seattle flight. As a general rule, arrive at least two hours before international departures and an hour ahead for domestic flights.

  • If you're heading away during a bank holiday or another peak period, give yourself more time. A good general rule is two hours before domestic flights and up to four hours before international departures. Queues at check-in and security will be longer.

  • Central Harlingen to HRL is around 5 kilometres. Depending on traffic conditions, it'll take you about 10 minutes to reach there if you're catching a cab, ride-sharing or driving.

  • If you have an early flight from Valley International Airport to Seattle, why not stay somewhere nice and close? Avoid the stress of rushing to the airport (and get some extra sleep) at Pool and Hot Tub Lakefront Harlingen Home. Pool and Game Room Waterfront Harlingen Home is another convenient option near HRL.

  • 82.44% of flights departing from Valley International Airport reach their destination on time. Given its strong performance rating, you're unlikely to experience delays when setting off from HRL.

  • You'll find HRL at 3002 Heritage Way.

How to find the cheapest flights from Valley International Airport (HRL) to Seattle

  • 91 € is currently the lowest price for a one-way Valley International Airport to Seattle flight. Return plane tickets start from 255 €. These fares can change depending on availability.

  • To find cheap flights from HRL to Seattle, book ahead. Airlines usually offer lower prices when tickets first go on sale.

  • The 'Whole month' search tool will show you the cheapest tickets from Valley International Airport to Seattle throughout the month. It's a great way to snap up a bargain if your dates are flexible.

  • There's no need to keep checking in to see if fares have dropped when you create a Price Alert. We'll notify you the moment there's an even bigger deal on cheap flights from HRL to Seattle.

  • Select your ideal departure and arrival times, number of stops and airlines with our filters. Then, sort the results for your flight from Valley International Airport to Seattle by 'Best,' 'Fastest' or 'Cheapest.'

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport (SEA) is around 23 kilometres from the centre of Seattle. If you're catching a cab or a ride-share, the drive takes roughly 20 minutes.

  • Travelling by public transport takes around 55 minutes.

  • The last thing you want is a long journey to your hotel if you're getting in late on a flight from Valley International Airport to Seattle. Check in to one of these accommodation options near SEA instead:

  • Get on the fast track to adventure by picking up a Seattle-Tacoma International Airport rental car. Grab a set of wheels from Thrifty, Europcar or Budget and explore beyond Seattle's main sights.

  • Lock in the best deal by booking your vehicle from Seattle-Tacoma International Airport around one week ahead of your flight from HRL to Seattle.

Lake Union Sea Plane Base Airport (LKE)

  • After your flight from Valley International Airport to Seattle has touched down, you can make your way to the city centre in about 10 minutes by car. Central Seattle is roughly 3 kilometres from Lake Union Sea Plane Base Airport (LKE).

  • The journey will take about 25 minutes on public transport.

  • Following your HRL to Seattle flight, settle in at a hotel near LKE. These are some comfortable options that'll help you switch to relaxation mode:

Best time to go to Seattle

  • Carefully consider your travel dates before booking your flight from Valley International Airport to Seattle. The city comes alive during peak season, but rates are typically higher and top attractions can be busy. Visit Seattle in the low season if you want a quieter vibe.

  • Before booking a Valley International Airport to Seattle plane ticket, think about the weather you're most comfortable in. August is the warmest month in Seattle, with temperatures ranging from 12ºC (54ºF) to 28ºC (82ºF).

  • If you want to travel in cooler conditions, search for a cheap ticket from HRL to Seattle in February when temperatures average between -1ºC (30ºF) and 11ºC (52ºF).

More about Seattle

  • Once you've booked your flight from Valley International Airport to Seattle, choose a hotel that puts you right where the action is. Make one of these options your base for exploring Seattle:

  • There are so many things to do and see in this city it can be hard to know where to begin. LMN Architects, Greyhound: Bus Station and Boeing Radiation Effects Lab are leading attractions which should feature on any well-planned Seattle itinerary.

Explore more of United States

  • Portland is just one of the many cities in United States waiting to be explored once you've seen the sights of Seattle. Around 241 kilometres away to the south, popular attractions include Pioneer Courthouse Square, Portland Japanese Garden and Pittock Mansion.

  • Spokane is another essential stop in United States and is around 370 kilometres east of Seattle. No trip is complete without dropping by Manito Park, Northwest Museum of Arts & Culture and Spokane Falls.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.