STL - YYC

C$ 230 Find Cheap Flights from St. Louis to Calgary – Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
C$ 401
Typical prices: C$ 833-C$ 1,053
Multiple Airlines
Tue 25/9Sat 29/9
STL - YYC • 1 stop
Cheapest one-way flights
C$ 230
Typical prices: C$ 321-C$ 555
American Airlines
Mon 1/10
STL - YYC • 1 stop
Direct flights
Not available
There are currently no direct flights between St. Louis and Calgary. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
18 weeks
in advance
Our data shows that travellers who book at least 18 weeks in advance save around 30% compared to booking last minute.
Insights
Insights
When to travel
April
Cheapest • 18% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Detroit Metropolitan Wayne County (DTW)
Cheapest • Avg C$ 772 (round-trip)
Minneapolis St Paul (MSP)
Shortest trip • 5h 55m (one-way)
Insights
Insights
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We hope you enjoy your trip to Calgary!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Calgary (STL-YYC)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Calgary

Fri, 25 Sep - Tue, 29 Sep
Multiple Airlines Logo
2:29 p.m. - 9:50 p.m.STL  Lambert-St Louis-YYC Calgary
8h 21m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
9:00 p.m. - 1:10 p.m.YYC  Calgary-STL Lambert-St Louis
15h 10m2 stops Vancouver Intl Atlanta Hartsfield-Jackson
C$ 401Multiple Airlines
Fri, 25 Sep - Tue, 29 Sep
Multiple Airlines Logo
2:29 p.m. - 5:10 p.m.STL  Lambert-St Louis-YYC Calgary
27h 41m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
7:00 a.m. - 1:10 p.m.YYC  Calgary-STL Lambert-St Louis
29h 10m1 stop Atlanta Hartsfield-Jackson
C$ 411Multiple Airlines
Wed, 30 Sep - Tue, 6 Oct
Multiple Airlines Logo
2:29 p.m. - 3:15 p.m.STL  Lambert-St Louis-YYC Calgary
25h 46m2 stops Atlanta Hartsfield-Jackson Vancouver Intl
Multiple Airlines Logo
7:00 a.m. - 1:10 p.m.YYC  Calgary-STL Lambert-St Louis
29h 10m1 stop Atlanta Hartsfield-Jackson
C$ 415Multiple Airlines
Wed, 30 Sep - Sun, 4 Oct
Multiple Airlines Logo
2:29 p.m. - 3:15 p.m.STL  Lambert-St Louis-YYC Calgary
25h 46m2 stops Atlanta Hartsfield-Jackson Vancouver Intl
Multiple Airlines Logo
12:20 a.m. - 1:10 p.m.YYC  Calgary-STL Lambert-St Louis
11h 50m1 stop Atlanta Hartsfield-Jackson
C$ 417Multiple Airlines
Wed, 30 Sep - Sun, 4 Oct
Multiple Airlines Logo
2:29 p.m. - 3:15 p.m.STL  Lambert-St Louis-YYC Calgary
25h 46m2 stops Atlanta Hartsfield-Jackson Vancouver Intl
Multiple Airlines Logo
12:20 a.m. - 1:10 p.m.YYC  Calgary-STL Lambert-St Louis
11h 50m1 stop Atlanta Hartsfield-Jackson
C$ 422Multiple Airlines
Fri, 2 Oct - Tue, 6 Oct
Multiple Airlines Logo
2:29 p.m. - 11:00 a.m.STL  Lambert-St Louis-YYC Calgary
21h 31m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
9:00 p.m. - 1:10 p.m.YYC  Calgary-STL Lambert-St Louis
15h 10m2 stops Vancouver Intl Atlanta Hartsfield-Jackson
C$ 444Multiple Airlines
Wed, 30 Sep - Tue, 6 Oct
Multiple Airlines Logo
8:10 p.m. - 2:45 p.m.STL  Lambert-St Louis-YYC Calgary
19h 35m1 stop Denver Intl
Multiple Airlines Logo
7:00 a.m. - 1:10 p.m.YYC  Calgary-STL Lambert-St Louis
29h 10m1 stop Atlanta Hartsfield-Jackson
C$ 447Multiple Airlines
Wed, 21 Oct - Tue, 27 Oct
Multiple Airlines Logo
6:35 p.m. - 11:00 a.m.STL  Lambert-St Louis-YYC Calgary
17h 25m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
12:25 a.m. - 5:40 p.m.YYC  Calgary-STL Lambert-St Louis
16h 15m1 stop Atlanta Hartsfield-Jackson
C$ 447Multiple Airlines
Fri, 23 Oct - Thu, 29 Oct
Multiple Airlines Logo
6:35 p.m. - 11:00 a.m.STL  Lambert-St Louis-YYC Calgary
17h 25m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
12:25 a.m. - 5:40 p.m.YYC  Calgary-STL Lambert-St Louis
16h 15m1 stop Atlanta Hartsfield-Jackson
C$ 448Multiple Airlines
Fri, 2 Oct - Tue, 6 Oct
Multiple Airlines Logo
2:29 p.m. - 11:00 a.m.STL  Lambert-St Louis-YYC Calgary
21h 31m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
7:00 a.m. - 1:10 p.m.YYC  Calgary-STL Lambert-St Louis
29h 10m1 stop Atlanta Hartsfield-Jackson
C$ 448Multiple Airlines
Booking Insights

Price, demand, and travel trends for St. Louis to Calgary flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from St. Louis to Calgary with more confidence.

What's the cheapest day of the week to fly from St. Louis to Calgary?

Tuesday is the cheapest day of the week to fly from St. Louis to Calgary and is 22% cheaper than the average day. Sunday is the most expensive day with flight prices 6% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • April is the cheapest month to fly from St. Louis to Calgary at C$ 771 round-trip.
  • February (C$ 1,250) and December (C$ 1,050) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 62% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from St. Louis to Calgary the cheapest?

Flights from St. Louis to Calgary are cheapest 18 weeks before departure. Booking in this window typically costs about 30% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for St. Louis to Calgary flights

Low season

March

Cheapest flight

C$ 230
Best time to beat the crowds (5% less expensive on average)
Most popular time to fly (9% more expensive on average)
Flights from St. Louis to Calgary

When to book flights from St. Louis to Calgary

Are your dates flexible? Find out the best times to travel from St. Louis to Calgary based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your St. Louis to Calgary flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • Which airports can I use when flying from St. Louis to Calgary?

    Flights from St. Louis to Calgary usually depart from Lambert-St Louis (STL) and arrive at Calgary (YYC).

  • Which cabin classes can I book on flights from St. Louis to Calgary?

    Only Economy Class is available on flights from St. Louis to Calgary.

  • Which airports do connecting flights from St. Louis to Calgary pass through?

    One-stop flights from St. Louis to Calgary most commonly connect through:

    • Chicago O'Hare Intl (ORD) – 49% of one-stop connections
    • Minneapolis St Paul (MSP) – 20% of one-stop connections
    • Denver Intl (DEN) – 19% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) – 5% of one-stop connections

    Chicago O'Hare Intl (ORD) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from St. Louis to Calgary?

    Yes. Being flexible with your travel dates can save you up to 26% on the St. Louis to Calgary route. Tuesday is the cheapest departure day at C$ 742 round-trip on average, while Sunday is the most expensive at C$ 1,003, a difference of C$ 261. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • Which popular places can I visit in Calgary?

    Some of the most popular sights in Calgary are Stampede Park, Scotiabank Saddledome, and Calgary Zoo. These are among the most viewed places in Calgary on KAYAK.

  • How expensive are last-minute St. Louis to Calgary flights?

    Last-minute fares on this route – booked within 2 weeks of departure – run 12% above the route average of C$ 941. Book 18 weeks before departure for the lowest fares.

  • How long does a flight from St. Louis to Calgary take?

    A direct flight from St. Louis to Calgary takes 0h 00m, covering 3,695 km.

  • Do I need a passport to fly from St. Louis to Calgary?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • Have flight prices from St. Louis to Calgary changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about C$ 401 to C$ 1,455. That means the highest observed fare was about 4x higher than the lowest one.

  • How are flight prices from St. Louis to Calgary looking right now?

    One-way fares from St. Louis to Calgary are currently lower than usual. Average one-way flight prices are about C$ 295, which is 37% below the typical average for this route.

  • How much time can I save by choosing a different layover airport when travelling from St. Louis to Calgary?

    Flying via Minneapolis St Paul (MSP) gives the shortest average 1-stop total travel time at 5h 55m, compared with 6h 07m via Denver Intl (DEN) and 6h 42m via Chicago O'Hare Intl (ORD).

  • What is the time difference between St. Louis and Calgary?

    Calgary is 1 hour behind St. Louis (Mountain Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Calgary Airport (YYC)?

    Calgary Airport (YYC) hosts 5 major car rental companies, with daily rates starting from around C$ 6 for economy cars. Top options include:
    · Routes Car & Truck Rentals
    · Avis
    · Thrifty
    · Budget
    · Hertz

  • How much should I expect to pay for a St. Louis to Calgary flight?

    Round-trip flights from St. Louis to Calgary range from C$ 833 to C$ 1,053, with an average of C$ 941 over the past 12 months. Anything below C$ 833 counts as a good deal.

Your guide to booking St. Louis to Calgary flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Tuesday departure instead of Sunday. On this route, Tuesday flights average C$ 742 – about C$ 261 less than Sunday (26% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 18 weeks before you fly. On this route, that window historically saves about 30% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your St. Louis to Calgary trip for April. Fares historically average C$ 771 round-trip in that month – typically C$ 479 less than the most expensive month, which is February (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Calgary Airport.
    - Comfort Inn & Suites Calgary Airport - North
    - Hyatt Place Calgary Airport
    - Hotel 11, Mod A Sonesta Collection

More options for your flight from St. Louis to Calgary

Complete your trip to Calgary with a hotel stay or car rental

Car rentals in Calgary
Hotels in Calgary
Vacations in Calgary