Question 1

What is the cheapest month to book a flight from Portsmouth to Seattle?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Portsmouth to Seattle (average of £622). Flying from Portsmouth to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 2

Weekly flight availability from Portsmouth to Seattle

Accepted Answer

The most flights from P0R to SEA are scheduled on a Monday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (11 on average).

Question 3

E

Accepted Answer

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Question 4

E

Accepted Answer

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Question 5

What are the cheapest flights from Portsmouth to Seattle?

Accepted Answer

Looking for the cheapest flight from Portsmouth to Seattle? While on average our users pay £2,160, our data indicates the cheapest price to be £464. The most popular route (Southampton Eastleigh - Seattle/Tacoma Intl), is priced around £838.

Question 6

What are the most reliable airlines from Portsmouth to Seattle?

Accepted Answer

Before booking your flight to Seattle from Portsmouth, check out the most reliable airlines to get you to your destination on time: Aeromexico (95%), KLM (93%), Air France( 93%).

Question 7

What are the most popular airlines that fly from Portsmouth to Seattle?

Accepted Answer

When booking a flight from Portsmouth to Seattle, you may want to consider flying on Air Canada, Air France or Finnair as they are the most popular for this route.

Question 8

How far in advance should I book a flight from Portsmouth to Seattle?

Accepted Answer

Travelers have found it’s best to book a flight 44 days in advance to save up to 39% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 44 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Portsmouth to Seattle 1-2 weeks in advance for as low as £545, or £790 for flights within the next 24 hours.

Question 9

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

Accepted Answer

January can be a great time to fly to Seattle from Portsmouth with a flight ticket averaging about £554. Cheapflights users have found deals in the month of January for as cheap as £322. The most expensive prices can be found in the month of August.

Question 10

What is the cheapest time of day to fly from P0R to SEA?

Accepted Answer

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to Seattle as you normally would.

Question 11

What airport do you fly into for flights to Seattle from Portsmouth?

Accepted Answer

For a flight from Portsmouth to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 0 inbound flights from Portsmouth per day. 13 airlines have flights to Seattle/Tacoma Intl from Portsmouth on a regular basis.

Question 12

Can I find deals for flights from Portsmouth to Seattle that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Portsmouth to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 13

How can I find direct flights from Portsmouth to Seattle?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to Seattle.

Question 14

Can I find deals for business class flights from Portsmouth to Seattle?

Accepted Answer

Yes. Cheapflights offers flight deals from Portsmouth to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 15

How does Cheapflights help users find flights from Portsmouth to Seattle?

Accepted Answer

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Seattle from Portsmouth today with Cheapflights!

Question 16

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Seattle?

Accepted Answer

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Portsmouth to Seattle for you. Better yet — we are completely free to use.

Question 17

Can Cheapflights find flights from Portsmouth to Seattle with no change fees?

Accepted Answer

Yes, we can. To see specific flights from Portsmouth to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Question 18

Can Cheapflights notify me if prices for flights from Portsmouth to Seattle become cheaper?

Accepted Answer

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Seattle from Portsmouth today and book when prices fit your budget.

Round-trip from	£849
One-way from	£464
Popular in	August
Cheapest in	January
Average price	£723

Airline	Cheapest	Average	Flexibility	On-time
Aer Lingus	Cheapest£7	Average£655	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Icelandair	Cheapest£321	Average£492	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air France	Cheapest£381	Average£562	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Lufthansa	Cheapest£381	Average£483	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£394	Average£503	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Finnair	Cheapest£399	Average£552	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
KLM	Cheapest£401	Average£567	FlexibilityNo cancel fee	On-time75%	Search KLM flights
British Airways	Cheapest£418	Average£577	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£437	Average£551	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Delta	Cheapest£439	Average£614	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights

Cheap flights from Portsmouth to Seattle from £464

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portsmouth to Seattle

Keep the following information in mind while searching for Portsmouth to Seattle flight deals. Data was last updated 11 juillet 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portsmouth to Seattle

Cheapest flights from Portsmouth to SeattleExplore the most affordable flight options available from Portsmouth to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 juillet 2025.

Explore the most affordable flight options available from Portsmouth to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 juillet 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portsmouth to Seattle that are best for you.

Best time to book a flight from Portsmouth to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Portsmouth with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Portsmouth to Seattle

What is the cheapest month to book a flight from Portsmouth to Seattle?

What is the cheapest time of day to fly from P0R to SEA?

Find hourly flight availability from Portsmouth to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 juillet 2025.

Weekly flight availability from Portsmouth to Seattle

Explore weekly flight availability from Portsmouth to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 11 juillet 2025.

Reviews of airlines servicing Seattle

Check out reviews from past customers who have flown with KLM, Virgin Atlantic, andAer Lingus from Portsmouth to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Seattle from Portsmouth?

What are the most reliable airlines from Portsmouth to Seattle?

What are the cheapest flights from Portsmouth to Seattle?

Can I find deals for flights from Portsmouth to Seattle that include hotel bookings?

How can I find direct flights from Portsmouth to Seattle?

Can I find deals for business class flights from Portsmouth to Seattle?

What is the cheapest month to book a flight from Portsmouth to Seattle?

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Alternative routes for Portsmouth to Seattle

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Top 10 airlines flying from Portsmouth to Seattle

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How does Cheapflights help users find flights from Portsmouth to Seattle?

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Seattle?

Can Cheapflights find flights from Portsmouth to Seattle with no change fees?

Can Cheapflights notify me if prices for flights from Portsmouth to Seattle become cheaper?

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Cheapest flights from Portsmouth to Seattle
Explore the most affordable flight options available from Portsmouth to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 juillet 2025.