$362 Cheap Flights from Moncton (YQM) to St. Louis (STL)

View $362 flight on Sat, Aug 30, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $362 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Moncton (YQM) to St. Louis (STL)
Origin airport
Greater Moncton Intl.
Destination airport
Lambert-St. Louis Intl.
Distance
1397 mi

Moncton to St. Louis Flights

The cheapest times to fly from Moncton to St. Louis

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 Moncton to St. Louis are during the month of . You can find some of the cheapest flights from Moncton to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Moncton to St. Louis: 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 Moncton to St. Louis

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 Moncton to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $362 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 Moncton to St. Louis 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 Moncton to St. Louis 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.

 

Frequently asked questions

How much does a flight from Greater Moncton Intl. Airport (YQM) to Lambert-St. Louis Intl. Airport (STL) cost?
Secure a cheap one-way flight from $362 or cheap return flight from Greater Moncton Intl. Airport (YQM) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Greater Moncton Intl. Airport (YQM) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from YQM to STL is , when there's less demand. Off-peak season is typically when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Greater Moncton Intl. Airport (YQM) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest YQM to STL flight.
How many flights per day from Greater Moncton Intl. Airport (YQM) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily nonstop flights available from Greater Moncton Intl. Airport (YQM) to Lambert-St. Louis Intl. Airport (STL). But you can choose flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way in no time at all.
What day of the week has the most flights from YQM to STL?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change based on a number of factors, such as 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 Greater Moncton Intl. Airport (YQM) to Lambert-St. Louis Intl. Airport (STL)?
To reach Lambert-St. Louis Intl. Airport (STL) without delays, book a flight that leaves Greater Moncton Intl. Airport (YQM) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Greater Moncton Intl. Airport (YQM) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute bookings from YQM to STL are generally more expensive. To lock in the best prices, start searching for flights as soon as possible. That said, if your travel plans are flexible, you may score a cheap ticket just before your departure.
Is it cheaper to book a YQM to STL flight and hotel package?
Opting for a YQM to STL flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Choose from our wide range of hotels and then add car rentals, activities and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Greater Moncton Intl. Airport (YQM) to Lambert-St. Louis Intl. Airport (STL)?
If you booked your YQM to STL flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

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