CA $511 Cheap Flights from St. Louis (STL) to Thunder Bay (YQT)

View CA $511 flight on Wed, Aug. 13, 2025Opens in a new window

Popular airlines from Lambert-St. Louis International Airport (STL) to Thunder Bay, ON (YQT-Thunder Bay Intl.)

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Cheap flights from St. Louis (STL) to Thunder Bay (YQT)

Prices were available within the past 7 days and start at CA $511 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 Thunder Bay (STL - YQT) route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Thunder Bay Intl.
Distance
1067 km

St. Louis to Thunder Bay Flights

The easy way to book your flights from St. Louis to Thunder Bay 

With Expedia, it’s simple to find and book flights to Thunder Bay from St. Louis whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 10 airlines that cover this route. There are nonstop flights to Thunder Bay Intl., 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 Thunder Bay today, tomorrow, or this week.  

 

Save dollars with cheap flights from Lambert-St. Louis Intl., STL to Thunder Bay Intl., YQT 

Sort your search results by price to find great deals on your flight from St. Louis to Thunder Bay—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Thunder Bay 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 Thunder Bay  
  • 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 Thunder Bay 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 Thunder Bay with Expedia today.

Frequently asked questions

How much is a flight from Lambert-St. Louis Intl. Airport (STL) to Thunder Bay Intl. Airport (YQT)?
Based on fares listed within the last 7 days on Expedia for flights departing within the next year, round-trip flights between Lambert Field and YQT start from . Make your booking today to score the best price for your exciting adventure. 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-St. Louis Intl. Airport (STL) to Thunder Bay Intl. Airport (YQT)?
Every airline has a different set of terms and conditions. If you decide to cancel your trip, visit our Customer Service Portal.
How do I find cheap flights from STL to Thunder Bay Intl. Airport that have flexible change policies?
Use our "No change fees" filter to find flexible travel options for your flight from STL to Thunder Bay Intl. Airport (YQT). This allows you to snag a good price in advance and still have the freedom to make changes without any extra fees. Fare adjustments may apply if your new flight is more expensive.
How many hours is the flight from Lambert-St. Louis Intl. Airport (STL) to Thunder Bay Intl. Airport?
You may like to bring your own entertainment (like some downloaded podcasts), as it takes approximately 3 hours and 51 minutes to fly to Thunder Bay Intl. Airport (YQT) from Lambert Field. A good pair of noise-cancelling earphones will be handy too.
How far is the flight from Lambert-St. Louis Intl. Airport (STL) to Thunder Bay Intl. Airport?
A flight distance of just 1,100 kilometres separates St. Louis and Thunder Bay. Once you're in the air, you won't get a chance to do much more than browse the magazine in your seat-back pocket.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to YQT?
There are no direct flights, so you'll have to make at least one stop between STL and YQT. Make the most of the layover time to stretch your legs and freshen up.
Are STL to Thunder Bay Intl. Airport (YQT) flight tickets cheaper when they're purchased at the last minute?
Flight prices change all the time, so not always. While last-minute flight deals between STL and YQT are of course possible, it also makes sense to keep a close eye on prices well before you fly. In fact, some carriers publicize their prices up to a year prior to the departure date. Expedia is constantly updating the biggest bargains around, so keep checking back and be ready to grab your seat when the fares dip.

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