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$141+ Cheap flights from Louisville (SDF) to Ontario

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — YYZ
apr. 5 — apr. 121
za 4/5
za 4/12
1 adult, Economy
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Cheap flight deals from Louisville to Ontario

Keep the following information in mind while searching for Louisville to Ontario flight deals. Data was last updated maart 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$253
(Mytrip)

One-way from

$141
(Flightnetwork)

Popular in

December

Cheapest in

November

Average price

$400
Provider with most accurate pricing for Louisville Intl-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Louisville Intl-Toronto (YTO) flights.
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From Louisville Intl to Ontario
Search Deals
One-way flight from Louisville Intl to Ontario
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Highest demand for flights based on searches. 17% potential increase in price ($80 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Louisville to Ontario

Cheapest flights from Louisville to Ontario
Explore the most affordable flight options available from Louisville to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on maart 31, 2025.

This Mytrip deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ma 5/126:48 pmSDF - YYZ
1 stop19h 17mMultiple Airlines
ma 5/194:00 pmYYZ - SDF
1 stop20h 03mMultiple Airlines
Deal found 3/30$253
This Mytrip deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vr 4/115:45 amSDF - YUL
1 stop9h 10mMultiple Airlines
zo 4/133:55 pmYUL - SDF
1 stop30h 22mMultiple Airlines
Deal found 3/30$286
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vr 6/208:05 amSDF - YYZ
1 stop9h 07mDelta
ma 6/231:25 pmYYZ - SDF
1 stop7h 49mDelta
Deal found 3/31$352
This American Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
wo 4/305:45 amSDF - YUL
2 stops11h 00mAmerican Airlines
zo 5/44:04 pmYUL - SDF
1 stop5h 23mAmerican Airlines
Deal found 3/30$382
This Air Canada deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
do 5/110:08 amSDF - YUL
1 stop9h 37mAir Canada
wo 5/76:15 amYUL - SDF
1 stop14h 10mAir Canada
Deal found 3/30$383
This WestJet deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
wo 4/304:46 pmSDF - YUL
2 stops31h 51mWestJet
zo 5/46:45 amYUL - SDF
2 stops8h 49mWestJet
Deal found 3/30$466
This WestJet deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
do 4/107:03 pmSDF - YYZ
2 stops26h 08mWestJet
do 4/243:59 pmYYZ - SDF
1 stop5h 35mWestJet
Deal found 3/31$500
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vr 4/46:00 amSDF - YOW
1 stop11h 40mMultiple Airlines
ma 4/75:55 amYOW - SDF
2 stops14h 42mMultiple Airlines
Deal found 3/29$515
This Mytrip deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
wo 8/136:00 amSDF - YYZ
1 stop4h 04mAir Canada
wo 8/2010:19 amYYZ - SDF
1 stop4h 31mAir Canada
Deal found 3/31$528
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ma 6/3010:00 amSDF - YYZ
1 stop4h 19mUnited Airlines
wo 7/212:05 pmYYZ - SDF
2 stops7h 36mUnited Airlines
Deal found 3/30$540
This Gotogate deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
wo 8/137:00 amSDF - YOW
2 stops6h 44mAir Canada
wo 8/2011:05 amYOW - SDF
2 stops9h 08mAir Canada
Deal found 3/31$656
This United deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
zo 8/178:40 amSDF - YUL
2 stops13h 04mUnited Airlines
zo 8/248:05 amYUL - SDF
2 stops12h 57mUnited Airlines
Deal found 3/30$751

Cheapflights Fare Finder

Customize your flight search to find flights from Louisville to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated maart 31, 2025.
Use the filters below to find and compare flights from Louisville to Ontario that are best for you.

Fly from

Louisville

Fly to

Ontario

Route

Depart

Return

Price

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

ma 5/12

6:48 pm-2:05 pm

1 stop19h 17m

Toronto Pearson Intl

ma 5/19

4:00 pm-12:03 pm

1 stop20h 03m

$253

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

vr 4/11

5:45 am-2:55 pm

1 stop9h 10m

Montreal Pierre Elliott Trudeau Intl

zo 4/13

3:55 pm-10:17 pm

1 stop30h 22m

$286

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

vr 6/20

8:05 am-5:12 pm

1 stop9h 07m

Toronto Pearson Intl

ma 6/23

1:25 pm-9:14 pm

1 stop7h 49m

$352

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

wo 4/30

5:45 am-4:45 pm

2 stops11h 00m

Montreal Pierre Elliott Trudeau Intl

zo 5/4

4:04 pm-9:27 pm

1 stop5h 23m

$382

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

do 5/1

10:08 am-7:45 pm

1 stop9h 37m

Montreal Pierre Elliott Trudeau Intl

wo 5/7

6:15 am-8:25 pm

1 stop14h 10m

$383

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

wo 4/30

4:46 pm-12:37 am

2 stops31h 51m

Montreal Pierre Elliott Trudeau Intl

zo 5/4

6:45 am-3:34 pm

2 stops8h 49m

$466

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

do 4/10

7:03 pm-9:11 pm

2 stops26h 08m

Toronto Pearson Intl

do 4/24

3:59 pm-9:34 pm

1 stop5h 35m

$500

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

wo 8/13

6:00 am-10:04 am

1 stop4h 04m

Toronto Pearson Intl

wo 8/20

10:19 am-2:50 pm

1 stop4h 31m

$528

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

ma 6/30

10:00 am-2:19 pm

1 stop4h 19m

Toronto Pearson Intl

wo 7/2

12:05 pm-7:41 pm

2 stops7h 36m

$540

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

wo 8/13

7:00 am-1:44 pm

2 stops6h 44m

Ottawa

wo 8/20

11:05 am-8:13 pm

2 stops9h 08m

$656

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/29

Showing 1-10 of 21 results
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Best time to book a flight from Louisville to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Louisville with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Louisville to Ontario

What is the cheapest month to book a flight from Louisville to Region of Ontario?

Currently, January is the cheapest month in which you can book a flight from Louisville to Region of Ontario (average of $243). Flying from Louisville to Region of Ontario in July is currently the most expensive (average of $359). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated maart 31, 2025.
To help decide which airline to fly from Louisville to Ontario, see what other customers have to say about Delta, United Airlines and American Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,614 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,789 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.0
Good
9,012 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Louisville to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Louisville to Ontario?

    If you book a flight to Ontario from Louisville, you will be flying from Louisville Intl, which is the city’s only airport. Louisville Intl (SDF) is located 5.3 mi from the center of Louisville.

  • What are the cheapest airlines to fly from Louisville to Region of Ontario one-way?

    One-way options have recently been found by users for as low as $141 on Air Canada. Other airlines that offer cheap prices include Delta from $163 and American Airlines from $166 one-way.

  • What are the most popular routes from Louisville to Region of Ontario?

    The most popular flight routes from Louisville to Region of Ontario are Louisville Intl - Montreal Pierre Elliott Trudeau Intl, Louisville Intl - Toronto Pearson Intl and Louisville Intl - Ottawa.

  • Can I find deals for flights from Louisville to Ontario that include hotel bookings?

    Yes. In addition to deals on Louisville to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Louisville to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Louisville to Ontario.

  • Can I find deals for business class flights from Louisville to Ontario?

    Yes. Cheapflights offers flight deals from Louisville to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Louisville to Region of Ontario?

    Currently, January is the cheapest month in which you can book a flight from Louisville to Region of Ontario (average of $243). Flying from Louisville to Region of Ontario in July is currently the most expensive (average of $359). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Louisville to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Louisville to Ontario

Discover the top 5 airlines that operate flights from Louisville to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated maart 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$276Average$398FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$276Average$536FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$276Average$398FlexibilityNo cancel feeOn-time71%
DeltaCheapest$312Average$424FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$331Average$541FlexibilityNo cancel feeOn-time60%
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