Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from Portland to St Louis
The cheapest flights right now
Portland – St Louis
Outbound – Nov 10, 2026
1 stop
7h 20m MDW
Return – Nov 16, 2026
1 stop
6h 50m DAL
$351
yesterday
Portland – St Louis
Outbound – Nov 10, 2026
1 stop
7h 20m MDW
Return – Nov 16, 2026
1 stop
6h 10m DEN
$380
yesterday
Portland – St Louis
Outbound – Nov 10, 2026
1 stop
6h 40m DAL
Return – Nov 16, 2026
1 stop
6h 50m DAL
$422
yesterday
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Cheapest flight tickets
$407
Average price of a round trip
$479
Average flight ticket price recorded over the last 3 months for a round trip.
Flight duration
10h17
A flight from Portland to St Louis takes on average 10h17.
Best time
September
According to user searches, the ideal month to go to St Louis is September.
The best flight deals for a week
Portland – St Louis
Outbound – Nov 10, 2026
1 stop
7h 20m MDW
Return – Nov 16, 2026
1 stop
6h 50m DAL
$351
yesterday
Portland – St Louis
Outbound – Nov 10, 2026
1 stop
7h 20m MDW
Return – Nov 16, 2026
1 stop
6h 10m DEN
$380
yesterday
Portland – St Louis
Outbound – Nov 10, 2026
1 stop
6h 40m DAL
Return – Nov 16, 2026
1 stop
6h 50m DAL
$422
yesterday
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Price of flight tickets from Portland to St Louis
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from $407 to $579
- The average price of a flight ticket is about $479
- Prices are lowest for stays in the month of October
- The month in which booking a ticket is cheaper is: September
info departure city :
Portland, USA
airports :
Portland International Airport (PDX)
Pearson Airpark (VUO)
local time :
Portland is a city in the country USA, the time zone is [[timezone]]. In Portland, it is currently {fromLocalTime}, the temperature is on average 14°C, with a minimum of 11°C and a maximum of 19°C.
The city of Portland has 2 airport(s): Portland and Pearson Airpark
destination info :
St Louis, USA
airports :
Lambert-St. Louis International Airport (STL)
St. Louis Downtown Airport (CPS)
Spirit of St. Louis Airport (SUS)
local time :
St Louis is in the country USA, the time zone is [[timezone]]. In St Louis, it is currently {toLocalTime}, the temperature is on average 16°C, with a minimum of 10°C and a maximum of 22°C.
The city of St Louis has 3 airport(s): Lambert-St. Louis, St. Louis Downtown and Spirit of St. Louis
Useful info about St Louis
What is the least touristic period to go to St Louis?
If you want to visit St Louis during the least touristic period, choose the month of September.
What is the most popular time to travel to St Louis?
In St Louis, the most popular month is October. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight from Portland to St Louis?
According to our data, it is recommended to book your flight 16 days before your departure. If you book your flight ticket 3 weeks before your departure, you may find a price below average. The cheapest day to book a flight from Portland to St Louis is Saturday.
What are the arrival and destination airports when traveling between Portland and St Louis?
When you leave, you can leave from Portland, and you will arrive at Lambert-St. Louis.
How to reach Portland airport from the city centre?
The airport Portland is located 10 km or Pearson Airpark is located 10 km from the city centre. You can access it by using public transportation, taking a taxi, or renting a car.
Are there other means of transportation to go from Portland to St Louis?
Airplane is the only means of transportation listed on Liligo for this journey.
Are there big differences in weather between Portland and St Louis?
In summer, the average temperature is 25°C in St Louis and 20°C in Portland. The average rainfall in summer is 135 mm in St Louis and 19 mm in Portland. In summer, it is warmer in St Louis and it rains less in Portland. In winter, it is colder in Portland and it rains more in Portland.
