CA $445 Cheap Flights from St. Louis (STL) to Saint John (YSJ)

View CA $445 flight on Sat, Sep. 27, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at CA $445 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flight from St. Louis to Saint John (STL - YSJ) route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Saint John
Distance
2127 km

St. Louis to Saint John Flights

The easy way to book your flights from St. Louis to Saint John 

With Expedia, it’s simple to find and book flights to Saint John from St. Louis whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 2 airlines that cover this route. There are nonstop flights to Saint John, too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from St. Louis to Saint John today, tomorrow, or this week.  

 

Save dollars with cheap flights from Lambert-St. Louis Intl., STL to Saint John, YSJ 

Sort your search results by price to find great deals on your flight from St. Louis to Saint John—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Saint John from St. Louis currently is just rising to .  

Here are more money-saving tips: 

  • Fly in when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Saint John  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Saint John from St. Louis 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Saint John with Expedia today.

Frequently asked questions

How much is a flight from STL to Saint John Airport (YSJ)?
The lowest price advertised for a round-trip flight between Lambert Field and YSJ is . But you better move fast. This figure is based on fares available within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Lambert Field to YSJ?
We get that your situation can change unexpectedly, so we've made it as simple as possible for you to cancel your flight online. Just visit the Customer Service Portal and follow the instructions.
How do I find cheap flights from STL to Saint John Airport (YSJ) that have flexible change policies?
Select our "No change fees" filter to find flexible travel options for your flight from Lambert Field to Saint John Airport (YSJ). This allows you to lock in a low rate ahead of time and still have the freedom to reschedule without any extra fees. You'll just need to pay the fare difference, if applicable.
How many hours is the flight from Lambert-St. Louis Intl. Airport (STL) to Saint John Airport (YSJ)?
The flight time from Lambert-St. Louis Intl. Airport (STL) to YSJ is around 3 hours and 51 minutes. Grab your headphones, listen to your favourite tunes and the hours will fly by.
How far is the flight from STL to Saint John Airport?
You'll be in the air for a while, as the flight distance from St. Louis to Saint John is 2,100 kilometres. Put together a playlist of your favourite songs before leaving home to keep yourself entertained during the flight.
Which airlines fly direct from STL to Saint John Airport?
There are no direct flights, so you'll need to make at least one stop between Lambert Field and Saint John Airport. Make the most of the layover time to stretch your legs and enjoy some personal space.
Are Lambert-St. Louis Intl. Airport (STL) to YSJ flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can sometimes find a bargain, with some of the cheapest fares from Lambert-St. Louis Intl. Airport (STL) to Saint John Airport (YSJ) showing up a few weeks before the departure date. If you'd rather book ahead of time, Expedia compares and updates all the best flight deals continuously --- as early as a year in advance in some cases. It does depend on the carrier though, as not all airlines issue prices so far in advance.

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