Alaska's Premium Class offers extra legroom and free cocktails, but snacks and meals require purchase.
Alaska Airlines offers 32” legroom in Main Cabin, with pre-order meals available online 24 hours before flight.

Most accurate provider | Justfly.com 3 stars |
|---|---|
Most trusted provider | Justfly.com 3 stars |
Round-trip from | $103 (Frontier) |
One-way from | $59 (United Airlines) |
Popular in | December |
Cheapest in | October |
Average price | $542 |
Good round-trip deal | $119 or less |
Good one-way deal | $84 or less |
Fly from
Fly to
Route
Depart
Return
Price
San FranciscoSeattle
SFO - SEA
SFOSEA
San Francisco
Thu 1/22
10:30 am-12:53 pm
Nonstop2h 23m
Seattle/Tacoma Intl
Mon 1/26
9:55 am-5:47 pm
1 stop7h 52m
San FranciscoSeattle
SFO - SEA
SFOSEA
San Francisco
Fri 3/13
4:03 pm-11:21 pm
1 stop7h 18m
Seattle/Tacoma Intl
Sun 3/15
7:20 am-9:46 am
Nonstop2h 26m
San FranciscoSeattle
SFO - SEA
SFOSEA
San Francisco
Tue 2/10
10:30 am-12:53 pm
Nonstop2h 23m
Seattle/Tacoma Intl
Fri 2/27
7:00 pm-11:54 pm
1 stop4h 54m
San FranciscoSeattle
SFO - SEA
SFOSEA
San Francisco
Fri 3/6
6:05 am-8:25 am
Nonstop2h 20m
Seattle/Tacoma Intl
Mon 3/9
5:55 pm-11:16 pm
1 stop5h 21m
San FranciscoSeattle
SFO - SEA
SFOSEA
San Francisco
Wed 1/21
1:35 pm-6:42 pm
1 stop5h 07m
Seattle/Tacoma Intl
Sat 1/24
11:30 am-1:43 pm
Nonstop2h 13m
San FranciscoSeattle
SFO - SEA
SFOSEA
San Francisco
Tue 1/20
1:35 pm-8:36 pm
1 stop7h 01m
Seattle/Tacoma Intl
Wed 1/28
9:20 pm-11:30 pm
Nonstop2h 10m
San FranciscoSeattle
SFO - SEA
SFOSEA
San Francisco
Sat 1/31
5:55 am-12:57 pm
1 stop7h 02m
Seattle/Tacoma Intl
Mon 2/2
9:20 pm-11:30 pm
Nonstop2h 10m
OntarioSeattle
ONT - SEA
ONTSEA
Ontario
Sat 1/10
3:30 pm-6:35 pm
Nonstop3h 05m
Seattle/Tacoma Intl
Thu 1/15
5:25 am-12:16 pm
1 stop6h 51m
OntarioSeattle
ONT - SEA
ONTSEA
Ontario
Fri 3/6
5:00 pm-12:09 am
1 stop7h 09m
Seattle/Tacoma Intl
Mon 3/9
7:50 pm-10:33 pm
Nonstop2h 43m
OntarioSeattle
ONT - SEA
ONTSEA
Ontario
Thu 1/15
1:11 pm-6:29 pm
1 stop5h 18m
Seattle/Tacoma Intl
Sun 1/25
11:15 am-1:56 pm
Nonstop2h 41m
Currently, January is the cheapest month in which you can book a flight from USA to Seattle (average of $38). Flying from USA to Seattle in July is currently the most expensive (average of $79). 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.
It’s typically best to fly out from USA to Seattle in the evening. Doing so could potentially save you 13% on the flight price compared to flying in the morning, which is usually more expensive.
Travelers seeking maximum savings on their USA to Seattle flight should consider departing on Monday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from US0 to SEA are scheduled on a Tuesday (102 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).
About 14% of weekly flights between United States and Seattle have experienced delays in the past year, with the average delay time being 149 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Over the last year, SkyWest Airlines have had the lowest number of delays on this route, with just 6% of flights being delayed.
Entertainment
Crew
Overall
Boarding
Food
Comfort
Reviews
Anonymous,Dec 2025
SJC - SEA
Entertainment
Crew
Overall
Boarding
Food
Comfort
Reviews
Anonymous,Dec 2025
SJC - SEA
Entertainment
Crew
Overall
Boarding
Food
Comfort
Reviews
Anonymous,Dec 2025
SJC - SEA
Entertainment
Crew
Overall
Boarding
Food
Comfort
Reviews
Anonymous,Dec 2025
SJC - SEA
Entertainment
Crew
Overall
Boarding
Food
Comfort
Reviews
Anonymous,Dec 2025
SJC - SEA
Entertainment
Crew
Overall
Boarding
Food
Comfort
Reviews
Anonymous,Dec 2025
SJC - SEA
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$51 | Average$231 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$58 | Average$189 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$103 | Average$331 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$106 | Average$326 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$117 | Average$326 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$119 | Average$356 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$127 | Average$358 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$145 | Average$334 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$153 | Average$394 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$174 | Average$380 | FlexibilityNo cancel fee | On-time71% |