Cheap Flights from St. Louis (STL) to Saint John (YSJ)

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Saint John, NB (YSJ)

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Saint John Airport (YSJ) cost?
Secure a cheap one-way flight or cheap return flight from Lambert-St. Louis Intl. Airport (STL) to Saint John Airport (YSJ) 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 Lambert-St. Louis Intl. Airport (STL) to Saint John Airport (YSJ)?
Planning your trip for is a great way to save, as it's the cheapest month for flights between STL and YSJ. You'll usually find the lowest fares during the off-season.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Saint John Airport (YSJ)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll fly you from STL to YSJ. Then, sort your results by "Price (lowest to highest)" to snag a good deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Saint John Airport (YSJ)?
You'll have to book a flight with a layover if you're traveling from Lambert-St. Louis Intl. Airport (STL) to Saint John Airport (YSJ). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from STL to YSJ?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*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 Saint John Airport (YSJ)?
Opt for a flight from Lambert-St. Louis Intl. Airport (STL) to Saint John Airport (YSJ) that takes off before 3 PM to reduce the risk of cancellations. Departures after this hour have a 22% higher chance of being canceled, on average.**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 Saint John Airport (YSJ) last-minute?
Booking your ticket from STL to YSJ right before your trip is typically more expensive. However, if there's some wiggle room with your schedule, you could bag a cheap last-minute fare.
Is it cheaper to book a STL to YSJ flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to YSJ flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one easy place will take the hassle out of planning your trip. Simply pick your flights and select from our wide range of stays, then customize your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Saint John Airport (YSJ)?
It's usually possible to cancel or reschedule your STL to YSJ flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Saint John
Distance
1329 mi

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St. Louis to Saint John Flights

The cheapest times to fly from St. Louis to Saint John

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

 

The best time to book a flight from St. Louis to Saint John

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

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 Saint John in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 Saint John 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 Saint John 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 Saint John Flights

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*Available to One Key members.