A group of people standing in front of the Saint John Jewish Historical Museum.

CA $532 Cheap Flights from St. Louis (STL) to Saint John (YSJ)

View CA $532 flight on Fri, Aug 21, 2026Opens 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 $532 for one-way flights and CA $1,058 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Fri, Aug 21 - Mon, Aug 31
STL
St. Louis
YSJ
Saint John
CA $1,058 Roundtrip, found 9 hours ago
CA $1,058
Roundtrip
found 9 hours ago
Select Air Canada flight, departing Fri, Aug 21 from St. Louis to Saint John, returning Mon, Aug 31, priced at CA $1,058 found 9 hours ago
United
Fri, Aug 21 - Mon, Aug 31
STL
St. Louis
YSJ
Saint John
CA $1,077 Roundtrip, found 9 hours ago
CA $1,077
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Aug 21 from St. Louis to Saint John, returning Mon, Aug 31, priced at CA $1,077 found 9 hours ago
United
Fri, Aug 21 - Mon, Aug 31
STL
St. Louis
YSJ
Saint John
CA $1,122 Roundtrip, found 9 hours ago
CA $1,122
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Aug 21 from St. Louis to Saint John, returning Mon, Aug 31, priced at CA $1,122 found 9 hours ago
Air Canada
Fri, Aug 21 - Mon, Aug 31
STL
St. Louis
YSJ
Saint John
CA $1,137 Roundtrip, found 9 hours ago
CA $1,137
Roundtrip
found 9 hours ago
Select Air Canada flight, departing Fri, Aug 21 from St. Louis to Saint John, returning Mon, Aug 31, priced at CA $1,137 found 9 hours ago
Air Canada
Tue, Aug 18 - Sat, Aug 29
STL
St. Louis
YSJ
Saint John
CA $1,138 Roundtrip, found 9 hours ago
CA $1,138
Roundtrip
found 9 hours ago
Select Air Canada flight, departing Tue, Aug 18 from St. Louis to Saint John, returning Sat, Aug 29, priced at CA $1,138 found 9 hours ago
Air Canada
Tue, Aug 18 - Thu, Sep 3
STL
St. Louis
YSJ
Saint John
CA $1,155 Roundtrip, found 9 hours ago
CA $1,155
Roundtrip
found 9 hours ago
Select Air Canada flight, departing Tue, Aug 18 from St. Louis to Saint John, returning Thu, Sep 3, priced at CA $1,155 found 9 hours ago
United
Fri, Aug 21 - Mon, Aug 31
STL
St. Louis
YSJ
Saint John
CA $1,171 Roundtrip, found 9 hours ago
CA $1,171
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Aug 21 from St. Louis to Saint John, returning Mon, Aug 31, priced at CA $1,171 found 9 hours ago
Air Canada
Fri, Aug 21 - Mon, Aug 31
STL
St. Louis
YSJ
Saint John
CA $1,180 Roundtrip, found 9 hours ago
CA $1,180
Roundtrip
found 9 hours ago
Select Air Canada flight, departing Fri, Aug 21 from St. Louis to Saint John, returning Mon, Aug 31, priced at CA $1,180 found 9 hours ago
United
Fri, Aug 21 - Mon, Aug 31
STL
St. Louis
YSJ
Saint John
CA $1,203 Roundtrip, found 9 hours ago
CA $1,203
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Aug 21 from St. Louis to Saint John, returning Mon, Aug 31, priced at CA $1,203 found 9 hours ago
Air Canada
Fri, Aug 21 - Mon, Aug 31
STL
St. Louis
YSJ
Saint John
CA $1,208 Roundtrip, found 9 hours ago
CA $1,208
Roundtrip
found 9 hours ago
Select Air Canada flight, departing Fri, Aug 21 from St. Louis to Saint John, returning Mon, Aug 31, priced at CA $1,208 found 9 hours ago

Frequently asked questions

How much does a flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ) cost?
You can find one-way and return flights from STL to YSJ with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when STL to YSJ ticket fares go up or down.
What is the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ)?
The cheapest months to fly from STL to YSJ are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ)?
Enter STL to YSJ and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ)?
Air Canada is one of the cheapest airlines offering connecting return flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ), with prices starting from around CA$948 for flights that can be booked for departure within the next year. These flights typically include a layover in Pierre Elliott Trudeau Intl. (YUL). These prices are for economy/coach class per adult. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ)?
To find a cheap flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ)?
There are approximately 12 connecting flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ). Some common connection points include O'Hare Intl., LaGuardia, and Liberty Intl.
What is the earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from STL to YSJ. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ)?
You'll typically find the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ) on a Monday, with around 15 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include United, Air Canada, and Delta.
What are the most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ)?
The most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ) are between 12pm and 3pm. Many major carriers, including Air Canada, United and Delta, offer flights during this window. Many travellers prefer this time because it allows for a relaxed morning before heading to the airport, and you'll arrive at your destination in the afternoon.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ)?
There are no nonstop flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ). The shortest flights typically involve one stop, taking around 5 hours 48 minutes. Flights with two or more stops usually take longer, averaging about 11 hours 30 minutes. The distance between these two cities is approximately 2,140 kilometres. Keep in mind that actual flight times can vary due to factors like layover duration, weather, and air traffic.
Can you fly business or first class from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ)?
You can fly business class between STL and YSJ. Airlines that offer business class service on this route include:
  • Air Canada
How do I earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ) flight and hotel package?
Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ)?
If you booked your St. Louis, MO (STL-Lambert-St. Louis Intl.) to Saint John, NB (YSJ) flight within the last 24 hours, you may be able to modify or cancel 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, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Saint John
Roundtrip price
CA $1,058
Distance
2127 km

Book with confidence

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 20 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 CA $1,058 rising to CA $2,297.  

Here are more money-saving tips: 

  • Fly in August 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.

St. Louis to Saint John Flights

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