$616 Cheap Flights from Louisville (SDF) to Thunder Bay (YQT)

View $616 flight on Fri, Oct 24, 2025Opens in a new window

Popular airlines from Louisville Intl. Airport (SDF) to Thunder Bay, ON (YQT-Thunder Bay Intl.)

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Cheap Flights from Louisville to Thunder Bay (SDF-YQT)

Prices were available within the past 7 days and start at $616 for one-way flights and $883 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Oct 25 - Fri, Oct 31
SDF
Louisville
YQT
Thunder Bay
$883 Roundtrip, found 3 days ago
$883
Roundtrip
found 3 days ago
Select United flight, departing Sat, Oct 25 from Louisville to Thunder Bay, returning Fri, Oct 31, priced at $883 found 3 days ago
United
Sun, Oct 26 - Sat, Nov 1
SDF
Louisville
YQT
Thunder Bay
$940 Roundtrip, found 3 days ago
$940
Roundtrip
found 3 days ago
Select United flight, departing Sun, Oct 26 from Louisville to Thunder Bay, returning Sat, Nov 1, priced at $940 found 3 days ago
United
Mon, Oct 27 - Sat, Nov 1
SDF
Louisville
YQT
Thunder Bay
$942 Roundtrip, found 3 days ago
$942
Roundtrip
found 3 days ago
Select United flight, departing Mon, Oct 27 from Louisville to Thunder Bay, returning Sat, Nov 1, priced at $942 found 3 days ago
United
Mon, Oct 27 - Fri, Oct 31
SDF
Louisville
YQT
Thunder Bay
$950 Roundtrip, found 3 days ago
$950
Roundtrip
found 3 days ago
Select United flight, departing Mon, Oct 27 from Louisville to Thunder Bay, returning Fri, Oct 31, priced at $950 found 3 days ago
United
Tue, Oct 21 - Fri, Oct 31
SDF
Louisville
YQT
Thunder Bay
$958 Roundtrip, found 3 days ago
$958
Roundtrip
found 3 days ago
Select United flight, departing Tue, Oct 21 from Louisville to Thunder Bay, returning Fri, Oct 31, priced at $958 found 3 days ago
United
Sat, Oct 25 - Tue, Oct 28
SDF
Louisville
YQT
Thunder Bay
$1,016 Roundtrip, found 3 days ago
$1,016
Roundtrip
found 3 days ago
Select United flight, departing Sat, Oct 25 from Louisville to Thunder Bay, returning Tue, Oct 28, priced at $1,016 found 3 days ago
United
Mon, Oct 27 - Thu, Oct 30
SDF
Louisville
YQT
Thunder Bay
$1,018 Roundtrip, found 3 days ago
$1,018
Roundtrip
found 3 days ago
Select United flight, departing Mon, Oct 27 from Louisville to Thunder Bay, returning Thu, Oct 30, priced at $1,018 found 3 days ago
United
Fri, Oct 24 - Fri, Oct 31
SDF
Louisville
YQT
Thunder Bay
$1,021 Roundtrip, found 3 days ago
$1,021
Roundtrip
found 3 days ago
Select United flight, departing Fri, Oct 24 from Louisville to Thunder Bay, returning Fri, Oct 31, priced at $1,021 found 3 days ago
United
Tue, Oct 21 - Thu, Oct 30
SDF
Louisville
YQT
Thunder Bay
$1,034 Roundtrip, found 3 days ago
$1,034
Roundtrip
found 3 days ago
Select United flight, departing Tue, Oct 21 from Louisville to Thunder Bay, returning Thu, Oct 30, priced at $1,034 found 3 days ago
Air Canada
Fri, Oct 24 - Thu, Oct 30
SDF
Louisville
YQT
Thunder Bay
$1,186 Roundtrip, found 3 days ago
$1,186
Roundtrip
found 3 days ago
Select Air Canada flight, departing Fri, Oct 24 from Louisville to Thunder Bay, returning Thu, Oct 30, priced at $1,186 found 3 days ago

Frequently asked questions

How much does a flight from Louisville Intl. Airport (SDF) to Thunder Bay Intl. Airport (YQT) cost?
Lock in a cheap one-way flight from $616 or cheap return flight from $883 from Louisville Intl. Airport (SDF) to Thunder Bay Intl. Airport (YQT) 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 Louisville Intl. Airport (SDF) to Thunder Bay Intl. Airport (YQT)?
October is the least expensive month to fly from SDF to YQT. Planning your trip for the off-season is often the key to finding better fares.
What is the cheapest airline that flies from Louisville Intl. Airport (SDF) to Thunder Bay Intl. Airport (YQT)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll take you from SDF to YQT. Then, sort your results by "Price (lowest to highest)" to snap up the best deal available.
How many flights per day from Louisville Intl. Airport (SDF) to Thunder Bay Intl. Airport (YQT)?
There aren't any daily nonstop flights from Louisville Intl. Airport (SDF) to Thunder Bay Intl. Airport (YQT). But you can book flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way before you know it.
What day of the week has the most flights from SDF to YQT?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Louisville Intl. Airport (SDF) to Thunder Bay Intl. Airport (YQT)?
To avoid potential delays on the Louisville Intl. Airport (SDF) to Thunder Bay Intl. Airport (YQT) route, fly before 3 PM. Departures after this time have a 22% higher chance of cancellation.**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 Louisville Intl. Airport (SDF) to Thunder Bay Intl. Airport (YQT) last-minute?
Last-minute bookings from SDF to YQT are generally more expensive. To lock in the cheapest rates, start looking for flights well ahead of time. That being said, if your travel plans are flexible, it's possible to find a cheap fare right before your journey.
Is it cheaper to book a SDF to YQT flight and hotel package?
You'll typically save money by securing a SDF to YQT flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've selected your ideal flights and accommodations, consider adding extras including car rentals, activities and tours.
Can I cancel or change the date of my flight from Louisville Intl. Airport (SDF) to Thunder Bay Intl. Airport (YQT)?
You can usually cancel or reschedule your SDF to YQT flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Louisville Intl.
Destination airport
Thunder Bay Intl.
Roundtrip price
$882
Distance
726 mi

Book with confidence

Louisville to Thunder Bay Flights

The cheapest times to fly from Louisville to Thunder Bay

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 Louisville to Thunder Bay are during the month of October. You can find some of the cheapest flights from Louisville to Thunder Bay with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Louisville to Thunder Bay

Sunday is one of the best days to book for cheap flights from Louisville to Thunder Bay: 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 Louisville to Thunder Bay

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 Louisville to Thunder Bay in 2025. You can also book with separate airlines for your outbound and return journeys, from $616 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 Louisville to Thunder Bay 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 Louisville to Thunder Bay 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.

 

Louisville to Thunder Bay Flights

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*Available to One Key members.