$462 Cheap Flights from St. Louis (STL) to Moncton (YQM)

View $462 flight on Tue, Nov 25, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Moncton, NB (YQM-Greater Moncton Intl.)

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Cheap Flights from St. Louis to Moncton (STL-YQM)

Prices were available within the past 7 days and start at $462 for one-way flights and $896 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Nov 25 - Sun, Nov 30
STL
St. Louis
YQM
Moncton
$896 Roundtrip, found 5 days ago
$896
Roundtrip
found 5 days ago
Select United flight, departing Tue, Nov 25 from St. Louis to Moncton, returning Sun, Nov 30, priced at $896 found 5 days ago
United
Tue, Nov 25 - Sun, Nov 30
STL
St. Louis
YQM
Moncton
$902 Roundtrip, found 5 days ago
$902
Roundtrip
found 5 days ago
Select United flight, departing Tue, Nov 25 from St. Louis to Moncton, returning Sun, Nov 30, priced at $902 found 5 days ago
United
Tue, Nov 25 - Sun, Nov 30
STL
St. Louis
YQM
Moncton
$923 Roundtrip, found 5 days ago
$923
Roundtrip
found 5 days ago
Select United flight, departing Tue, Nov 25 from St. Louis to Moncton, returning Sun, Nov 30, priced at $923 found 5 days ago
United
Tue, Nov 25 - Sun, Nov 30
STL
St. Louis
YQM
Moncton
$924 Roundtrip, found 5 days ago
$924
Roundtrip
found 5 days ago
Select United flight, departing Tue, Nov 25 from St. Louis to Moncton, returning Sun, Nov 30, priced at $924 found 5 days ago
United
Tue, Nov 25 - Sun, Nov 30
STL
St. Louis
YQM
Moncton
$929 Roundtrip, found 5 days ago
$929
Roundtrip
found 5 days ago
Select United flight, departing Tue, Nov 25 from St. Louis to Moncton, returning Sun, Nov 30, priced at $929 found 5 days ago
United
Tue, Nov 25 - Sun, Nov 30
STL
St. Louis
YQM
Moncton
$931 Roundtrip, found 5 days ago
$931
Roundtrip
found 5 days ago
Select United flight, departing Tue, Nov 25 from St. Louis to Moncton, returning Sun, Nov 30, priced at $931 found 5 days ago
United
Tue, Nov 25 - Sun, Nov 30
STL
St. Louis
YQM
Moncton
$951 Roundtrip, found 5 days ago
$951
Roundtrip
found 5 days ago
Select United flight, departing Tue, Nov 25 from St. Louis to Moncton, returning Sun, Nov 30, priced at $951 found 5 days ago
United
Tue, Nov 25 - Sun, Nov 30
STL
St. Louis
YQM
Moncton
$953 Roundtrip, found 5 days ago
$953
Roundtrip
found 5 days ago
Select United flight, departing Tue, Nov 25 from St. Louis to Moncton, returning Sun, Nov 30, priced at $953 found 5 days ago
United
Tue, Nov 25 - Sun, Nov 30
STL
St. Louis
YQM
Moncton
$953 Roundtrip, found 5 days ago
$953
Roundtrip
found 5 days ago
Select United flight, departing Tue, Nov 25 from St. Louis to Moncton, returning Sun, Nov 30, priced at $953 found 5 days ago
Air Canada
Wed, Nov 26 - Mon, Dec 1
STL
St. Louis
YQM
Moncton
$1,095 Roundtrip, found 4 days ago
$1,095
Roundtrip
found 4 days ago
Select Air Canada flight, departing Wed, Nov 26 from St. Louis to Moncton, returning Mon, Dec 1, priced at $1,095 found 4 days ago

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Greater Moncton Intl. Airport (YQM) cost?
Lock in a cheap one-way flight from $462 or cheap return flight from $896 from Lambert-St. Louis Intl. Airport (STL) to Greater Moncton Intl. Airport (YQM) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Greater Moncton Intl. Airport (YQM)?
The cheapest month to fly from STL to YQM is November, when demand is low. Off-peak months are often when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Greater Moncton Intl. Airport (YQM)?
To find the cheapest airline flying from STL to YQM, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Greater Moncton Intl. Airport (YQM)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Greater Moncton Intl. Airport (YQM) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to YQM?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change depending on a range of factors, including the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Greater Moncton Intl. Airport (YQM)?
To land at Greater Moncton Intl. Airport (YQM) on schedule, pick a flight that takes off from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Greater Moncton Intl. Airport (YQM) last-minute?
Booking your plane ticket from STL to YQM shortly before your trip is usually more expensive. But if there's some wiggle room with your travel dates and times, you could score a cheap last-minute fare.
Is it cheaper to book a STL to YQM flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to YQM flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place will take the stress out of travel planning. Simply pick your flights and choose from our extensive range of hotels, then customize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Greater Moncton Intl. Airport (YQM)?
If you booked your STL to YQM flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Greater Moncton Intl.
Roundtrip price
$895
Distance
1397 mi

Book with confidence

St. Louis to Moncton Flights

The cheapest times to fly from St. Louis to Moncton

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Moncton are during the month of November. You can find some of the cheapest flights from St. Louis to Moncton with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Moncton

Sunday is one of the best days to book for cheap flights from St. Louis to Moncton: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Moncton

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Moncton in 2025. You can also book with separate airlines for your outbound and return journeys, from $462 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Moncton flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Moncton airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Moncton Flights

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*Available to One Key members.