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SEA - STL Price
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C$ 246 - C$ 402
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STL Temperature
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0 - 27 °C
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STL Rainfall
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56 - 119 mm
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Popular in December High demand for flights, 27% potential price rise |
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Cheapest in August Best time to find cheap flights, 16% potential price drop |
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Average price C$ 406 Average for round-trip flights in May 2022 |
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Round-trip from C$ 316 From Seattle/Tacoma Intl to Lambert-St Louis |
To save on the cost of your flight from Seattle to St. Louis, book at least 28 days before your planned departure. Booking around this time can save you about 69% on the cost of this flight compared to booking a flight leaving this week. We have found prices from C$ 406 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as C$ 596.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to St. Louis as you normally would.
Users have found that leaving on a Sunday can be a cost-effective option. It’s possible to save up to 41% on your flight compared to booking on days when demand is much higher.
The best pricing can be found in the month of August. Prices to St. Louis from Seattle average C$ 377. You can even find prices in August for less than C$ 377, as users have found deals to St. Louis from as low as C$ 227. The month of December appears to be one of the more expensive times to travel to St. Louis from Seattle. Flying in the targeted month can save you up to 37%.
Direct flights are available for this route on the following days: Sunday, Monday, Tuesday, Friday, Saturday.
Flights from Seattle/Tacoma Intl to Lambert-St Louis have been viewed 13 times in the past calendar month.
Per day, 12 flights depart from Seattle to St. Louis on average.
Morning (6am - Midday) - 25% of flight departures
Evening (6pm - Midnight) - 75% of flight departures
The top 3 most reliable airlines when flying from Seattle to St. Louis are Singapore Airlines (78%), Alaska Airlines (74%) and Japan Airlines (73%).
Information is based on travel restrictions for travel to Lambert-St Louis within the United States
Most visitors from Seattle/Tacoma Intl need to provide a negative COVID-19 test result and/or quarantine to enter Lambert-St Louis.
COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Lambert-St Louis.
Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering Lambert-St Louis.
Returning to Seattle/Tacoma Intl from Lambert-St Louis
COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Seattle/Tacoma Intl.
Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Seattle/Tacoma Intl.
| Afternoon Noon to 6 PM | 87% of flight departures |
| Morning 6 AM to noon | 12% of flight departures |
| Early morning Midnight to 6 AM | 1% of flight departures |
| Evening 6 PM to midnight | 0% of flight departures |