Cheap flights from Portsmouth to Seattle from $290

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3 stops
Mon, Nov 30
Portsmouth PSMSeattle SEA

$290
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2 stops
Mon, Nov 30
Portsmouth PSMSeattle SEA

$312
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3 stops
Wed, Nov 25
Portsmouth PSMSeattle SEA

$341
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2 stops
Tue, Nov 24
Portsmouth PSMSeattle SEA

$382
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2 stops
Tue, Nov 24
Portsmouth PSMSeattle SEA

$389
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3 stops
Wed, Nov 25
Portsmouth PSMSeattle SEA

$439
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3 stops
Mon, Nov 30 – Sat, Dec 5
Portsmouth PSMSeattle SEA

$551
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2 stops
Mon, Nov 30 – Sat, Dec 5
Portsmouth PSMSeattle SEA

$573
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3 stops
Mon, Nov 30 – Sun, Dec 6
Portsmouth PSMSeattle SEA

$582
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3 stops
Mon, Nov 30 – Sun, Dec 6
Portsmouth PSMSeattle SEA

$601
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2 stops
Mon, Nov 30 – Sun, Dec 6
Portsmouth PSMSeattle SEA

$623
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3 stops
Mon, Nov 30 – Sat, Dec 5
Portsmouth PSMSeattle BFI

$733
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How much do flights to Seattle cost?

Key info about flying to Seattle

Depart from
Portsmouth International Airport at Pease
Arrive to
Seattle–Tacoma International
Average flights per week
32
Flight distance
Worth visiting
Lulu Island

Check-in for a flight from Portsmouth to Seattle

NameCarrier codeIATA CodePassport needed during booking
Frontier AirlinesFFTF9No
BREEZE MXNo
-
-
Air CanadaACAACYes

Weather in Seattle

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January7°C2°C
February8°C2°C
March10°C3°C
April13°C5°C
May18°C8°C
June21°C10°C
July25°C13°C
August25°C14°C
September21°C11°C
October15°C8°C
November10°C4°C
December6°C2°C
Hottest Month
25°C
August
Coldest month
2°C
February
Sunny days
254
days per year
Snow days
5
days per year

14 day forecast

Friday
6 Nov
82%
13°C9°C
13 Nov
86%
13°C9°C
Saturday
7 Nov
87%
14°C9°C
14 Nov
90%
13°C10°C
Sunday
8 Nov
79%
13°C7°C
15 Nov
88%
12°C9°C
Monday
9 Nov
66%
12°C5°C
16 Nov
75%
11°C8°C
Tuesday
10 Nov
88%
13°C9°C
17 Nov
64%
11°C8°C
Wednesday
11 Nov
23%
17°C10°C
18 Nov
78%
9°C6°C
Thursday
12 Nov
20%
15°C10°C
19 Nov
41%
8°C5°C
Book your trip to arrive at Seattle–Tacoma International, Boeing Field, or Kenmore Air Harbor Seaplane Base. The most popular airlines for this route are Frontier Airlines, BREEZE, , and Air Canada. Portsmouth and Seattle have 32 direct flights per week.

Frequently asked questions

What are the most popular routes to and from Portsmouth?

What are the most popular routes to and from Seattle?

What airports are near Portsmouth?

What airports are near Seattle?

Which airlines fly between Portsmouth and Seattle?

When’s the best time to travel between Portsmouth and Seattle?

What flights operate between Portsmouth and Seattle?

How many airports are there near Portsmouth?

How many airports are there near Seattle?

What time do nonstop (direct) flights between Portsmouth and Seattle depart?

What time do nonstop (direct) flights between Portsmouth and Seattle arrive?

What time do flights between Portsmouth and Seattle depart?

What time do flights between Portsmouth and Seattle arrive?

Explore alternative trips

Flights from Portsmouth

Flights to Seattle

Popular routes

The nearest countries with flights to Seattle

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Other destination countries from Portsmouth

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