Cheap Flights to St. Marys , IA from CA $162

View CA $162 flight on Tue, Aug. 19, 2025Opens in a new window

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How much is the cheapest flight to St. Marys?

Prices were available within the past 7 days and start at CA $162 for one-way flights and CA $285 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Aug. 19 - Wed, Sep. 3
ORD
Chicago
DSM
Des Moines
CA $285 Roundtrip, found 21 hours ago
CA $285
Roundtrip
found 21 hours ago
Select Delta flight, departing Tue, Aug. 19 from Chicago to Des Moines, returning Wed, Sep. 3, priced at CA $285 found 21 hours ago
American Airlines
Wed, Aug. 27 - Mon, Sep. 1
BUF
Buffalo
DSM
Des Moines
CA $321 Roundtrip, found 4 days ago
CA $321
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Aug. 27 from Buffalo to Des Moines, returning Mon, Sep. 1, priced at CA $321 found 4 days ago
United
Tue, Aug. 19 - Mon, Sep. 8
ORD
Chicago
DSM
Des Moines
CA $340 Roundtrip, found 21 hours ago
CA $340
Roundtrip
found 21 hours ago
Select United flight, departing Tue, Aug. 19 from Chicago to Des Moines, returning Mon, Sep. 8, priced at CA $340 found 21 hours ago
WestJet
Wed, Aug. 20 - Sun, Aug. 24
YEG
Edmonton
DSM
Des Moines
CA $555 Roundtrip, found 4 days ago
CA $555
Roundtrip
found 4 days ago
Select WestJet flight, departing Wed, Aug. 20 from Edmonton to Des Moines, returning Sun, Aug. 24, priced at CA $555 found 4 days ago
Contour Airlines
Mon, Nov. 24 - Wed, Dec. 3
PBG
Plattsburgh
DSM
Des Moines
CA $773 Roundtrip, found 1 day ago
CA $773
Roundtrip
found 1 day ago
Select Contour Airlines flight, departing Mon, Nov. 24 from Plattsburgh to Des Moines, returning Wed, Dec. 3, priced at CA $773 found 1 day ago

Find the cheapest month to fly from Columbus (CMH) to Des Moines (DSM)

August is typically the cheapest month to fly

From CA $266 - CA $775 per traveller.

Graph displaying average flight prices per month

Expedia.ca gives you the best tools to secure great deals on flights to St. Marys. Use our easy and convenient booking engine to browse nonstop flights and convenient departure points every day of the year. Search airfares from the top airlines to book your perfect flight to St. Marys. Whatever your travel needs, you can always rely on Expedia.ca to help you find cheap flights to St. Marys.

Using our booking engine is simple - just type in your points of travel and preferred dates and Expedia.ca does the rest! If your travel times are flexible, you can find even better bargains by adjusting your flight dates. Browse connecting flights to increase your chances of finding even lower fares. Thanks to Expedia's Best Price Guarantee, you can book your St. Marys flights with full confidence knowing that you've found the best deal online.

Expedia.ca makes the booking process easy and stress-free by offering support along the entire way. Our friendly staff is available 24 hours a day to provide assistance and help you book your ticket. Call us toll-free at 1-888-397-3342 to answer any questions that you may have about your trip to St. Marys.

Looking to save even more? Get additional savings by bundling your St. Marys flight with a hotel and/or car rental to create a bargain travel package. Early birds can discover terrific savings by booking in advance while last minute travelers can enjoy great last minute deals. With Expedia.ca, there's no shortage of options to save even more on your St. Marys trip!

Frequently asked questions

What is the name of St. Marys' airport?
Organize a flight to St. Marys and you'll be hitting the tarmac at Des Moines Intl. Airport (DSM).
How far is Des Moines Intl. Airport from central St. Marys?
Long commutes aren't a big deal if you plan ahead of time. Downtown St. Marys is 26 kilometres from Des Moines Intl. Airport, so it's wise to know how to get to the city before you touchdown.
What airport is best to fly into St. Marys?
Des Moines Intl. Airport is the main airport in St. Marys. Before your flight, it's a good idea to research a thing or two about it. The terminal is situated 26 kilometres from the downtown area.
How many airlines fly to St. Marys?
St. Marys is serviced by 6 air carriers from at least 24 airports around the world.
Which airlines fly to St. Marys?
United Airlines and American Airlines operate the majority of flights to St. Marys. One of the most common ways to travel there is with a United Airlines flight from Chicago.
How many nonstop flights are there to St. Marys?
With approximately 307 nonstop flights running every week, you'll be arriving in St. Marys before you can say, "Are we there yet?"
Where are the most popular flights to St. Marys departing from?
A large number of flights to St. Marys depart from Chicago, Denver and Phoenix airports.
How long is the flight to St. Marys Airport?
If it's Chicago you're departing, you'll be midair for around 1 hour and 32 minutes before you arrive in St. Marys. Terminal to terminal from Denver takes around 1 hour and 50 minutes and from Phoenix, the average flight time is 2 hours and 49 minutes.
How to book the cheapest flight to St. Marys?
Don't leave booking your flight to St. Marys until the last moment. That's one move seasoned travellers use to get the best deals. Booking well in advance means more options and less expensive flights. Also, do some online research and compare your options. If your destination has multiple airports, you may be able to pick up a great deal by flying into a less busy terminal. And finally, don't forget that the early bird catches the worm. Know what a typical airfare costs and be ready to grab your ticket as soon as you see a great bargain. The sweetest deals don't last long.
Do you have any tips for my flight to St. Marys?
If you're not prepared, airports and flying can be daunting. But there's no need to worry. Follow these helpful hints for a trouble-free start to your vacation in St. Marys. What to pack in your hand luggage:

  • Air travel can be a pleasure if you take the right things. Firstly, you'll want some basic toiletries, such as deodorant and a toothbrush, a spare set of clothes and a good book. Next, find room in your hand luggage for your laptop, a charger, any medications and perhaps a comfy neck pillow as well. Last, but definitely not least, be sure to take your passport, travel docs and some cash.

Do not pack the following items in your hand luggage:

  • Check carefully that you don't have a sharp object lurking in one of the zippers of your carry-on luggage. Other restricted items include explosive or flammable products, like aerosols and matches, and liquids and gels in containers with a capacity of more than 3.4 ounces (100 millilitres).

What to wear on a flight:

  • Go for comfort over style. Prepare for temperature changes in the cabin by dressing in layers, and opt for closed-toe, flat footwear like sneakers.
  • Caused by lengthy periods of inactivity, deep vein thrombosis (DVT) is a blood clotting condition that can affect some passengers on long-haul flights. Reduce the risks by staying hydrated, keeping your feet and legs moving and wearing compression socks to help your circulation.

How to get through airport security fast when flying to St. Marys?
Being organized before your flight will make your trip to St. Marys a pleasure. Below are some useful tips for a stress-free journey past security:

  • Be sure to keep your travel documents and ID handy. They're the first things you'll be asked to show at airport security.
  • Time to strip down. Well sort of. Your belt, jacket, keys and other items in your pocket, like coins, will need to go through the X-ray machine. Make your life easier by removing them as it gets closer to your turn.
  • Electronic devices like phones and laptops will also have to go through the machine for inspection. No need to worry though, you'll be back online soon enough.
  • Want to bring along your favourite cologne? As long as the volume is no greater than 3.4 ounces (100 millilitres) and it's stored in a zip-close bag, you're permitted to bring it with you in your carry-on.
  • Lightweight sneakers are a good footwear choice as you're less likely to be required to remove them when going through security. Boots and other heavy-style shoes are often subjected to additional screening.
  • Airlines won't allow any sharp or pointed objects to come on board with you. If you must bring these kinds of items, pack them safely in your checked baggage.

Flights to St. Marys information
Destination airport
Des Moines Intl.
Destination airport IATA code
DSM
Destination city name
Des Moines
Roundtrip price
CA $284

Trending flights to St. Marys

Prices were available within the past 7 days and start at CA $162 for one-way flights and CA $285 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Sep. 6 - Sat, Sep. 6
YYC
Calgary
DSM
Des Moines
CA $531 Roundtrip, found 2 days ago
CA $531
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Sep. 6 from Calgary to Des Moines, returning Sat, Sep. 6, priced at CA $531 found 2 days ago
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