Skip to content

Get United's best fares today on flights from Porto to Seattle from *

Select journey type

Enter to select travel class and passengers

Low fare calendar for flights from Porto (OPO) to Seattle (SEA)

Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Lowest PriceToday
*Prices have been available for round trips within the last 48 hours and may not be currently available. Fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply.

Looking for additional flights from Porto to Seattle?

FromToDatesFare TypePrice

Porto (OPO)

Seattle (SEA)

Depart: 02/19/20

Return: 03/09/20

Roundtrip
from
$692*
Viewed:4hoursago

*Prices have been available for round trips within the last 48 hours and may not be currently available. Fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply.

Weather in Seattle

Saturday heavy intensity rain
44°F 01/18/20
Sunday moderate rain
42°F 01/19/20
Monday moderate rain
46°F 01/20/20
Tuesday moderate rain
47°F 01/21/20
Wednesday light rain
48°F 01/22/20
Thursday heavy intensity rain
43°F 01/23/20
Friday light rain
52°F 01/24/20
Powered by: OpenWeatherMap.org