Cheap flights from Portland to St. Louis (PWM - STL)

PWM — STL
Dec 12 — Dec 191

The best prices from Portland to Lambert-St Louis are usually found in December or February, booked 38 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

How to find the cheapest flight from Portland (PWM) to St. Louis (STL)

All the information you need to plan the best PWM to STL flight in 2022: compare Portland to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.

PWM - STL

Price

$270 - $568

STL

Temperature

32 - 80.6 °F

STL

Rainfall

2.2 - 4.7 inches

Popular inAugustHigh demand for flights, 23% potential price rise
Cheapest inDecemberBest time to find cheap flights, 38% potential price drop
Round-trip from$270From Portland to Lambert-St Louis
One-way from$153One-way flight from Portland to Lambert-St Louis

What is the cheapest day to fly round-trip from Portland, Maine to St. Louis?

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 33% when planning your travel around this day of the week.

How far in advance should I book a flight from Portland, Maine to St. Louis?

To save up to 37% on this flight, we recommend booking at least 37 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Portland, Maine to St. Louis from $511 1-2 weeks out and tickets from $611 for flights departing within the next 72 hours.

What is the cheapest month to fly from Portland, Maine to St. Louis?

Due to multiple factors, expect to potentially pay more when booking in August. For low rates, December can be a great choice for travel to St. Louis. Flights to St. Louis from Portland, Maine in December are about $436 on average during December, but can be found for as low as $255.

When is the cheapest time to fly from Portland, Maine to St. Louis (PWM - STL)?

When flying from Portland, Maine to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 24% versus a flight at noon.

Cheap flights from Portland to St. Louis in December, January 2022

The best prices found for PWM to STL flights for December, January
Jan 10 - Jan 13
PWM

Portland

STL

Lambert-St Louis

1 stop

7h 43m
STL

Lambert-St Louis

PWM

Portland

1 stop

14h 33m
$303

Multiple Airlines

Pick Dates

Deal found 12/5

Jan 18 - Jan 22
PWM

Portland

STL

Lambert-St Louis

1 stop

15h 26m
STL

Lambert-St Louis

PWM

Portland

1 stop

21h 50m
$325

Frontier

Pick Dates

Deal found 12/6

Jan 15 - Jan 18
PWM

Portland

STL

Lambert-St Louis

1 stop

6h 52m
STL

Lambert-St Louis

PWM

Portland

1 stop

6h 51m
$401

American Airlines

Pick Dates

Deal found 12/7

Portland to St. Louis 2022 flight deals

Cheap flights to St. Louis from Portland found for this year
Dec 17 - Dec 20
PWM

Portland

STL

Lambert-St Louis

1 stop

7h 05m
STL

Lambert-St Louis

PWM

Portland

1 stop

4h 50m
$447

Multiple Airlines

Pick Dates

Deal found 12/4

Dec 29 - Jan 3
PWM

Portland

STL

Lambert-St Louis

1 stop

5h 21m
STL

Lambert-St Louis

PWM

Portland

1 stop

4h 33m
$453

Delta

Pick Dates

Deal found 12/4

Dec 7 - Dec 9
PWM

Portland

STL

Lambert-St Louis

1 stop

7h 15m
STL

Lambert-St Louis

PWM

Portland

1 stop

5h 03m
$470

American Airlines

Pick Dates

Deal found 12/4

Cheap American Airlines flights from Portland to St. Louis

May 23 - May 30
PWM

Portland

STL

Lambert-St Louis

1 stop

7h 10m
STL

Lambert-St Louis

PWM

Portland

1 stop

4h 34m
$406

American Airlines

Pick Dates

Deal found 12/5

May 18 - May 22
PWM

Portland

STL

Lambert-St Louis

1 stop

5h 11m
STL

Lambert-St Louis

PWM

Portland

1 stop

6h 49m
$407

American Airlines

Pick Dates

Deal found 12/5

Dec 17 - Dec 21
PWM

Portland

STL

Lambert-St Louis

1 stop

7h 05m
STL

Lambert-St Louis

PWM

Portland

1 stop

5h 01m
$438

American Airlines

Pick Dates

Deal found 12/4

Cheap United Airlines flights from Portland to St. Louis

Jan 18 - Jan 22
PWM

Portland

STL

Lambert-St Louis

1 stop

5h 40m
STL

Lambert-St Louis

PWM

Portland

2 stops

15h 02m
$404

United Airlines

Pick Dates

Deal found 12/6

Feb 10 - Feb 12
PWM

Portland

STL

Lambert-St Louis

2 stops

26h 43m
STL

Lambert-St Louis

PWM

Portland

1 stop

17h 37m
$408

United Airlines

Pick Dates

Deal found 12/6

Feb 10 - Feb 12
PWM

Portland

STL

Lambert-St Louis

2 stops

26h 43m
STL

Lambert-St Louis

PWM

Portland

2 stops

13h 47m
$413

United Airlines

Pick Dates

Deal found 12/6

Last minute flights from Portland to St. Louis

Late deals on return flights to St. Louis from Portland, departing today and this week
Dec 17 - Dec 20
PWM

Portland

STL

Lambert-St Louis

1 stop

7h 05m
STL

Lambert-St Louis

PWM

Portland

1 stop

4h 50m
$447

Multiple Airlines

Pick Dates

Deal found 12/4

Dec 16 - Dec 18
PWM

Portland

STL

Lambert-St Louis

1 stop

21h 15m
STL

Lambert-St Louis

PWM

Portland

1 stop

24h 04m
$498

Multiple Airlines

Pick Dates

Deal found 12/6

Dec 13 - Jan 5
PWM

Portland

STL

Lambert-St Louis

1 stop

6h 08m
STL

Lambert-St Louis

PWM

Portland

1 stop

5h 01m
$507

American Airlines

Pick Dates

Deal found 12/6

One-way flights to St. Louis from Portland

The cheapest one-way flights from Portland to St. Louis
Dec 12
PWM

Portland

STL

Lambert-St Louis

2 stops

22h 50m
$153

Frontier

Pick Dates

Deal found 12/6

Dec 12
PWM

Portland

STL

Lambert-St Louis

1 stop

24h 13m
$169

Multiple Airlines

Pick Dates

Deal found 12/6

Dec 17
PWM

Portland

STL

Lambert-St Louis

1 stop

7h 05m
$220

American Airlines

Pick Dates

Deal found 12/5

Related info for your journey

Useful info, stats and facts about Portland to St. Louis flights.

Which airlines flying from Portland to Lambert-St Louis have flexible cancellations due to COVID-19?

Some of our airline partners flying from Portland to Lambert-St Louis have new flexible policies in place due to COVID-19. American Airlines, Delta, and United Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like American Airlines with this kind of flexibility.

Can I find flights from Portland, Maine to St. Louis for under $300 on Cheapflights?

Yes, there are multiple flights from Portland, Maine to St. Louis for under $300. The cheapest flight booked recently is on Multiple Airlines for just $291, but on average you can expect to pay $428.

Are there last-minute flights available from Portland, Maine to St. Louis for under $500?

There are currently 14+ open flights from Portland, Maine to St. Louis within the next 7 days for less than $500.

How popular is this Portland, Maine to St. Louis flight route?

Flights from Portland to Lambert-St Louis have been viewed 13 times in the past calendar month.

What are the cheapest airlines flying from Portland, Maine to St. Louis round-trip?

Flying on Frontier is currently your cheapest option to St. Louis, with prices starting at $325. Additional round-trip tickets that might be worth considering are offered by United Airlines and American Airlines, with the lowest prices starting at $404 and $406, respectively. Frontier is 25% cheaper than the average price of flights available within the next 90 days to this destination.

What are the most popular airlines that fly from Portland, Maine to St. Louis?

When booking a flight from Portland, Maine to St. Louis, you may want to consider flying on American Airlines, Delta or United Airlines as they are the most popular for this route.

What are the cheapest flights from Portland, Maine to St. Louis?

Looking at all options, your cheapest flight can be booked for $167. While the most popular route (Portland - Lambert-St Louis) can be booked for $303 on average our data indicates $791 when flying from Portland, Maine to St. Louis.

Alternative routes for Portland to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Portland to St. Louis

The chart below displays the airlines Cheapflights users traveling from Portland to St. Louis choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
American AirlinesCheapest$223Average$464FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
DeltaCheapest$275Average$503FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
United AirlinesCheapest$276Average$484FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights

Hourly flight availability from Portland to St. Louis

See what time of day planes typically take off from Portland to St. Louis
100%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
0%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM