Cheap flights from Calgary to St. Louis

Round-trip
Economy
Calgary (YYC)
St. Louis (STL)
Depart
Return
Any month
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The best prices from Calgary to Lambert-St Louis are usually found in April or June, booked 34 days in advance, depart on a Wednesday or Saturday and return on a Monday

How to find the cheapest flight from
Calgary (YYC) to St. Louis (STL)

All the information you need to plan the best YYC to STL flight in 2021: compare Calgary to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.
YYC - STL
Price
C$ 362 - C$ 635
STL
Temperature
0 - 27 °C
STL
Precipitation
56 - 119 mm

Popular in

September

High demand for flights, 30% potential price rise

Cheapest in

April

Best time to find cheap flights, 19% potential price drop

Round-trip from

€362

From Calgary to Lambert-St Louis

One-way from

C$ 343

One-way flight from Calgary to Lambert-St Louis

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Calgary to St. Louis?

It’s generally more expensive to depart on a Tuesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

How far in advance should I book a flight from Calgary to St. Louis?

Users have found that booking a flight from Calgary to St. Louis at least 34 days early can save you up to 43% on average compared to booking a flight this week. If booking 34 days before your flight isn’t an option for you, users have found flights from Calgary to St. Louis for as little as C$ 449 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as C$ 609 for flights departing within the next 3 days.

What is the cheapest month to fly from Calgary to St. Louis?

The best pricing can be found in the month of April. Prices to St. Louis from Calgary average C$ 445. You can even find prices in April for less than C$ 445, as users have found deals to St. Louis from as low as C$ 325. The month of September appears to be one of the more expensive times to travel to St. Louis from Calgary. Flying in the targeted month can save you up to 42%.

When is the cheapest time to fly from Calgary to St. Louis (YYC - STL)?

It’s typically best to fly out from Calgary to St. Louis at noon. Doing so could potentially save you 62% on the flight price compared to flying in the afternoon, which is usually more expensive.

Cheap flights from Calgary to St. Louis in September, October 2021

The best prices found for YYC to STL flights for September, October
16 Oct - 23 Oct
C$ 418pp
YYC
Calgary
Delta
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Delta
 
1 STOP
YYC
Calgary
18 Oct - 20 Oct
C$ 421pp
YYC
Calgary
WestJet
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
WestJet
 
1 STOP
YYC
Calgary
20 Oct - 23 Oct
C$ 426pp
YYC
Calgary
WestJet
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
WestJet
 
1 STOP
YYC
Calgary

Calgary to St. Louis 2021 flight deals

Cheap flights to St. Louis from Calgary found for this year
21 Nov - 3 Dec
C$ 416pp
YYC
Calgary
Delta
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Delta
   
2 STOPS
YYC
Calgary
16 Oct - 23 Oct
C$ 418pp
YYC
Calgary
Delta
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Delta
 
1 STOP
YYC
Calgary
26 Nov - 5 Dec
C$ 421pp
YYC
Calgary
United Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
 
1 STOP
YYC
Calgary

Last minute flights from Calgary to St. Louis

Late deals on round-trip flights to St. Louis from Calgary, departing today and this week
3 Oct - 9 Oct
C$ 566pp
YYC
Calgary
WestJet
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
WestJet
 
1 STOP
YYC
Calgary
3 Oct - 8 Oct
C$ 595pp
YYC
Calgary
Delta
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Delta
 
1 STOP
YYC
Calgary
3 Oct - 9 Oct
C$ 614pp
YYC
Calgary
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
 
1 STOP
YYC
Calgary

One-way flights to Lambert-St Louis from Calgary

The cheapest one-way flights from Calgary to St. Louis
6:00 a.m. - 2:05 p.m.
Delta
1 stop
7h 05m
YYC - STL
Delta
C$ 343
Delta
3:10 p.m. - 11:54 a.m.
Air Canada
2 stops
19h 44m
YYC - STL
Air Canada
C$ 401
8:05 p.m. - 5:22 p.m.
WestJet
2 stops
20h 17m
YYC - STL
WestJet
C$ 525

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Calgary</span> to <span class="emphasized">St. Louis</span> flights.

Flight FAQs

From Calgary to St. Louis

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

Due to the rapidly changing circumstances due to COVID-19, airlines like United Airlines, American Airlines, and WestJet flying from Calgary to Lambert-St Louis have implemented new flexible cancellation policies.

Can I find flights from Calgary to St. Louis for under C$ 500 on Cheapflights?

Yes, there are multiple flights from Calgary to St. Louis for under C$ 500. The cheapest flight booked recently is on Delta for just C$ 416, but on average you can expect to pay C$ 439.

Are there last-minute flights available from Calgary to St. Louis for under C$ 600?

There are currently 8+ open flights from Calgary to St. Louis within the next 7 days for less than C$ 600.

How popular is this Calgary to St. Louis flight route?

Flights from Calgary to Lambert-St Louis have been viewed 79 times in the past calendar month.

What are the cheapest airlines flying from Calgary to St. Louis round-trip?

Flying on Delta is currently your cheapest option to St. Louis, with prices starting at C$ 416. Additional round-trip tickets that might be worth considering are offered by United Airlines and WestJet, with the lowest prices starting at C$ 421 and C$ 426, respectively. Delta is priced at 6% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Calgary to St. Louis one-way?

C$ 343 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Air Canada and WestJet, with prices starting from C$ 401 and C$ 525, respectively.

What are the most popular airlines that fly from Calgary to St. Louis?

The most popular airlines flying from Calgary to St. Louis are American Airlines, Air Canada and Delta. Something to consider prior to booking your flight.

What are the cheapest flights from Calgary to St. Louis?

Looking at all options, your cheapest flight can be booked for C$ 195. While the most popular route (Calgary - Lambert-St Louis) can be booked for C$ 418 on average our data indicates C$ 588 when flying from Calgary to St. Louis

COVID Restrictions

View COVID Travel Restrictions for St. Louis, MO

Do I need a COVID test to fly to St. Louis from Calgary?

Information is based on travel restrictions from Calgary to Lambert-St Louis

Most visitors from Calgary need to provide a negative COVID-19 test result and/or quarantine to enter Lambert-St Louis.

COVID-19 testing requirements
Visitors from Calgary must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Lambert-St Louis.

Quarantine requirements
Visitors from Calgary are not required to quarantine after entering Lambert-St Louis.

Do I need a test to fly back to Calgary from St. Louis?

Returning to Calgary from Lambert-St Louis

COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) test taken 72 hours before departing to Calgary.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Calgary.

Hide COVID Travel Restrictions for St. Louis, MO

Destination information for St. Louis

Things to know before you go - useful duration and weather info for your trip from Calgary to St. Louis.
Today's exchange rate
C$ 1 = $0.79
Average temperature for September in St. Louis
28.0 °C
Avg rainfall for September in St. Louis
76.0 mm

Airports servicing Calgary

Airports servicing St. Louis

Top 5 airlines flying from Calgary to Lambert-St Louis

The chart below displays the airlines Cheapflights users travelling from Calgary to St. Louis choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Delta
C$ 202 C$ 487 No cancel fee N/A
Search Delta flights
American Airlines
C$ 276 C$ 560 No cancel fee 71%
Search American Airlines flights
WestJet
C$ 320 C$ 439 No cancel fee 60%
Search WestJet flights
United Airlines
C$ 342 C$ 763 No cancel fee 69%
Search United Airlines flights
Air Canada
C$ 355 C$ 521 No cancel fee 67%
Search Air Canada flights
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