$356 Cheap Flights from Fredericton (YFC) to St. Louis (STL)

View $356 flight on Sat, Oct 4, 2025Opens in a new window

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

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Cheap Flights from Fredericton to St. Louis (YFC-STL)

Prices were available within the past 7 days and start at $356 for one-way flights and $661 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Oct 8 - Wed, Oct 15
YFC
Fredericton
STL
St. Louis
$661 Roundtrip, found 3 days ago
$661
Roundtrip
found 3 days ago
Select United flight, departing Wed, Oct 8 from Fredericton to St. Louis, returning Wed, Oct 15, priced at $661 found 3 days ago
United
Wed, Oct 8 - Mon, Oct 13
YFC
Fredericton
STL
St. Louis
$663 Roundtrip, found 3 days ago
$663
Roundtrip
found 3 days ago
Select United flight, departing Wed, Oct 8 from Fredericton to St. Louis, returning Mon, Oct 13, priced at $663 found 3 days ago
United
Sat, Oct 11 - Wed, Oct 15
YFC
Fredericton
STL
St. Louis
$667 Roundtrip, found 3 days ago
$667
Roundtrip
found 3 days ago
Select United flight, departing Sat, Oct 11 from Fredericton to St. Louis, returning Wed, Oct 15, priced at $667 found 3 days ago
United
Sat, Oct 11 - Mon, Oct 13
YFC
Fredericton
STL
St. Louis
$669 Roundtrip, found 3 days ago
$669
Roundtrip
found 3 days ago
Select United flight, departing Sat, Oct 11 from Fredericton to St. Louis, returning Mon, Oct 13, priced at $669 found 3 days ago
United
Sat, Oct 18 - Tue, Oct 28
YFC
Fredericton
STL
St. Louis
$671 Roundtrip, found 6 days ago
$671
Roundtrip
found 6 days ago
Select United flight, departing Sat, Oct 18 from Fredericton to St. Louis, returning Tue, Oct 28, priced at $671 found 6 days ago
United
Wed, Oct 8 - Sat, Oct 11
YFC
Fredericton
STL
St. Louis
$691 Roundtrip, found 3 days ago
$691
Roundtrip
found 3 days ago
Select United flight, departing Wed, Oct 8 from Fredericton to St. Louis, returning Sat, Oct 11, priced at $691 found 3 days ago
United
Sat, Oct 18 - Sat, Oct 25
YFC
Fredericton
STL
St. Louis
$692 Roundtrip, found 6 days ago
$692
Roundtrip
found 6 days ago
Select United flight, departing Sat, Oct 18 from Fredericton to St. Louis, returning Sat, Oct 25, priced at $692 found 6 days ago
United
Wed, Oct 15 - Sat, Oct 18
YFC
Fredericton
STL
St. Louis
$693 Roundtrip, found 5 days ago
$693
Roundtrip
found 5 days ago
Select United flight, departing Wed, Oct 15 from Fredericton to St. Louis, returning Sat, Oct 18, priced at $693 found 5 days ago
United
Sun, Oct 12 - Mon, Oct 13
YFC
Fredericton
STL
St. Louis
$694 Roundtrip, found 3 days ago
$694
Roundtrip
found 3 days ago
Select United flight, departing Sun, Oct 12 from Fredericton to St. Louis, returning Mon, Oct 13, priced at $694 found 3 days ago
Porter Airlines
Fri, Aug 8 - Fri, Aug 15
YFC
Fredericton
STL
St. Louis
$1,892 Roundtrip, found 1 day ago
$1,892
Roundtrip
found 1 day ago
Select Porter Airlines flight, departing Fri, Aug 8 from Fredericton to St. Louis, returning Fri, Aug 15, priced at $1,892 found 1 day ago
Flights from Fredericton (YFC) to St. Louis (STL)
Origin airport
Greater Fredericton Intl.
Destination airport
Lambert-St. Louis Intl.
Roundtrip price
$660
Distance
1307 mi

Fredericton to St. Louis Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Fredericton 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 Fredericton 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 Fredericton to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $356 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 Fredericton 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 Fredericton 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 Fredericton Intl. Airport (YFC) to Lambert-St. Louis Intl. Airport (STL) cost?
Lock in a cheap one-way flight from $356 or cheap return flight from $661 from Greater Fredericton Intl. Airport (YFC) to Lambert-St. Louis Intl. Airport (STL) 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 Greater Fredericton Intl. Airport (YFC) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from YFC to STL is October, when demand is low. Off-peak season is generally when better flight deals are available between these airports.
What is the cheapest airline that flies from Greater Fredericton Intl. Airport (YFC) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline that'll fly you from YFC to STL, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Greater Fredericton Intl. Airport (YFC) to Lambert-St. Louis Intl. Airport (STL)?
Direct flights from Greater Fredericton Intl. Airport (YFC) to Lambert-St. Louis Intl. Airport (STL) 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 select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from YFC to STL?
Typically you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* However, this can vary based on the time of year, carrier and other factors.*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 Fredericton Intl. Airport (YFC) to Lambert-St. Louis Intl. Airport (STL)?
To land at Lambert-St. Louis Intl. Airport (STL) on schedule, choose a flight that takes off from Greater Fredericton Intl. Airport (YFC) before 3 PM. The likelihood 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 Fredericton Intl. Airport (YFC) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute bookings from YFC to STL are typically more expensive. For the best prices, start searching for flights well ahead of time. That being said, if you can play around with your travel dates, it's possible to find a cheap fare right before your journey.
Is it cheaper to book a YFC to STL flight and hotel package?
Securing a YFC to STL flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Choose from our impressive range of accommodations and then add flights, car rentals and activities 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 Fredericton Intl. Airport (YFC) to Lambert-St. Louis Intl. Airport (STL)?
If you reserved your YFC to STL flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

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*Available to One Key members.