Expect security screening at STL to take 5-10 minutes during off-peak times. Check real-time wait times online before heading to the airport.
Most accurate provider | FlightHub 3 stars |
---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $189 (Delta) |
One-way from | $95 (Delta) |
Popular in | July |
Cheapest in | October |
Average price | $317 |
Good round-trip deal | $407 or less |
Good one-way deal | $198 or less |
Fly from
Fly to
Route
Depart
Return
Price
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Mon 8/18
2:15 pm-6:26 pm
1 stop6h 11m
Seattle/Tacoma Intl
Wed 8/20
9:55 am-6:03 pm
1 stop6h 08m
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Sat 7/26
3:25 pm-12:15 am
1 stop10h 50m
Seattle/Tacoma Intl
Sun 8/3
10:40 pm-10:15 am
1 stop9h 35m
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Sat 5/3
7:33 am-2:03 pm
1 stop8h 30m
Seattle/Tacoma Intl
Tue 5/6
6:20 am-3:21 pm
1 stop7h 01m
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Mon 4/28
3:40 pm-10:43 pm
1 stop9h 03m
Seattle/Tacoma Intl
Sat 5/3
7:00 am-3:47 pm
1 stop6h 47m
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Sun 5/4
6:30 am-8:54 am
Nonstop4h 24m
Seattle/Tacoma Intl
Tue 5/13
6:03 pm-11:59 pm
Nonstop3h 56m
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Sat 4/26
6:30 am-8:54 am
Nonstop4h 24m
Seattle/Tacoma Intl
Sat 5/3
6:03 pm-11:59 pm
Nonstop3h 56m
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Sat 5/3
8:15 pm-12:44 am
1 stop6h 29m
Seattle/Tacoma Intl
Tue 5/6
6:00 am-9:59 am
1 stop25h 59m
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Thu 5/1
4:07 pm-12:44 am
1 stop10h 37m
Seattle/Tacoma Intl
Mon 5/5
6:03 pm-11:59 pm
Nonstop3h 56m
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Sun 5/25
10:20 am-8:14 am
1 stop23h 54m
Seattle/Tacoma Intl
Fri 5/30
11:59 pm-2:54 pm
1 stop12h 55m
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Thu 5/8
10:10 am-2:25 pm
2 stops30h 15m
Seattle/Tacoma Intl
Fri 5/16
3:20 pm-9:15 am
2 stops15h 55m
Provider | Price Accuracy | Trust Score* |
---|---|---|
Price Accuracy1 star | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*2 stars | |
Price Accuracy- | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy- | Trust Score*3 stars |
The best time to book flights from St. Louis to Seattle is 55 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, January is the cheapest month in which you can book a flight from St. Louis to Seattle (average of $238). Flying from St. Louis to Seattle in July is currently the most expensive (average of $411). 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.
Unlike in the morning, when flights are generally more expensive, you can save up to 3% on flights from St. Louis to Seattle by exploring options for tickets in the evening.
Travelers seeking maximum savings on their St. Louis to Seattle flight should consider departing on Wednesday mornings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from STL to SEA are scheduled on a Friday (10 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (2 on average).
In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.
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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).
Entertainment
Boarding
Overall
Crew
Food
Comfort
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Boarding
Overall
Crew
Food
Comfort
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Boarding
Overall
Crew
Food
Comfort
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Boarding
Overall
Crew
Food
Comfort
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Boarding
Overall
Crew
Food
Comfort
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Boarding
Overall
Crew
Food
Comfort
Reviews
Cheri,Jan 2025
FAT - SEA
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$118 | Average$190 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$171 | Average$263 | FlexibilityNo cancel fee | On-timeN/A | |
Cheapest$201 | Average$431 | FlexibilityNo cancel fee | On-time71% | |
Cheapest$216 | Average$364 | FlexibilityNo cancel fee | On-time69% | |
Cheapest$236 | Average$413 | FlexibilityNo cancel fee | On-time75% | |
Cheapest$237 | Average$415 | FlexibilityNo cancel fee | On-time85% | |
Cheapest$266 | Average$435 | FlexibilityNo cancel fee | On-time63% |