Cheap flights from Ontario to Louisville (ONT - SDF) from $173

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 8/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ONT — SDF
Jun 25 — Jul 21

The best prices from Ontario to Louisville Intl are usually found in September or December, booked 81 days in advance, depart on a Wednesday or Saturday and return on a Thursday

Cheap flight deals from Ontario to Louisville

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Louisville (SDF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 20, 2024.

Popular in

August

Cheapest in

September

Round-trip from

$287

One-way from

$268
High demand for flights, 33% potential price rise
Best time to find cheap flights, 69% potential price drop
From Ontario to Louisville Intl
One-way flight from Ontario to Louisville Intl

What is the cheapest day to fly round-trip from Ontario to Louisville?

Leaving on a Tuesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 26% on the overall cost on flights from Ontario to Louisville.

How far in advance should I book a flight from Ontario to Louisville?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 13 days in advance, which can save you up to 93% on flights from Ontario to Louisville compared to booking the week you need them. Waiting 13 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $123. For sooner than that we have options available in the next 3 days from $268.

What is the cheapest month to fly from Ontario to Louisville?

August can be a great time to fly to Louisville from Ontario with a flight ticket averaging about $265. Cheapflights users have found deals in the month of August for as cheap as $87. The most expensive prices can be found in the month of March.

What is the cheapest time of day to fly from ONT to SDF?

Unlike at noon, when flights are generally more expensive, you can save up to 81% on flights from Ontario to Louisville by exploring options for tickets in the afternoon.

Cheap Ontario to Louisville flights in June & July 2024

Find cheap flight options from Ontario to Louisville specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,256,981 searches. Prices were last updated on June 20, 2024.
Listed are some of the best fares we've found on flights departing from Ontario to Louisville in 2024. Check back in a little while for more flight options.
Sat 7/2711:23 amONT - SDF
1 stop8h 01mDelta
Sat 8/36:00 amSDF - ONT
1 stop7h 13mDelta
Deal found 6/19$352
Tue 7/3011:23 amONT - SDF
1 stop8h 01mDelta
Wed 8/216:00 amSDF - ONT
1 stop7h 13mDelta
Deal found 6/20$381
Tue 7/3011:23 amONT - SDF
1 stop9h 36mDelta
Thu 8/226:00 amSDF - ONT
1 stop7h 13mDelta
Deal found 6/20$383
Sat 7/2012:43 pmONT - SDF
1 stop6h 52mAmerican Airlines
Sat 7/278:35 pmSDF - ONT
1 stop6h 14mAmerican Airlines
Deal found 6/20$396
Sat 7/2010:00 pmONT - SDF
2 stops8h 45mDelta
Sat 7/276:05 pmSDF - ONT
1 stop7h 52mDelta
Deal found 6/20$401
Fri 7/1912:43 pmONT - SDF
1 stop6h 52mAmerican Airlines
Fri 7/268:35 pmSDF - ONT
1 stop6h 14mAmerican Airlines
Deal found 6/20$406
Tue 7/239:19 amONT - SDF
2 stops10h 26mAmerican Airlines
Sat 7/278:06 amSDF - ONT
1 stop8h 45mAmerican Airlines
Deal found 6/20$411
Sat 7/1310:48 amONT - SDF
1 stop8h 47mAmerican Airlines
Sun 7/288:35 pmSDF - ONT
1 stop6h 14mAmerican Airlines
Deal found 6/20$426
Tue 7/231:35 pmONT - SDF
1 stop5h 53mUnited Airlines
Wed 8/213:41 pmSDF - ONT
1 stop8h 21mUnited Airlines
Deal found 6/20$441

Ontario to Louisville 2024 flight deals

Discover exclusive flight deals for travel between Ontario and Louisville in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,256,981 searches. Data last updated June 20, 2024.
Listed are some of the best fares we've found on flights departing from Ontario to Louisville in 2024. Check back in a little while for more flight options.
Tue 8/1311:23 amONT - SDF
1 stop8h 14mDelta
Tue 8/206:20 pmSDF - ONT
1 stop7h 37mDelta
Deal found 6/19$306
Sat 8/311:23 amONT - SDF
1 stop8h 01mDelta
Sat 8/106:00 amSDF - ONT
1 stop7h 13mDelta
Deal found 6/19$307
Wed 8/76:00 amONT - SDF
1 stop8h 57mAmerican Airlines
Mon 8/128:27 pmSDF - ONT
1 stop6h 31mAmerican Airlines
Deal found 6/20$308
Tue 8/136:40 amONT - SDF
2 stops8h 17mAmerican Airlines
Wed 8/286:42 pmSDF - ONT
1 stop6h 45mAmerican Airlines
Deal found 6/20$311
Sat 8/36:50 amONT - SDF
1 stop7h 07mDelta
Sat 8/106:00 amSDF - ONT
2 stops9h 19mDelta
Deal found 6/19$312
Wed 8/76:40 amONT - SDF
2 stops9h 44mAmerican Airlines
Mon 8/128:27 pmSDF - ONT
1 stop6h 31mAmerican Airlines
Deal found 6/20$313
Tue 8/136:40 amONT - SDF
2 stops9h 44mAmerican Airlines
Wed 8/2811:46 amSDF - ONT
2 stops10h 16mAmerican Airlines
Deal found 6/20$316
Wed 8/76:40 amONT - SDF
2 stops9h 44mAmerican Airlines
Mon 8/123:07 pmSDF - ONT
2 stops9h 33mAmerican Airlines
Deal found 6/20$318
Thu 8/1511:23 amONT - SDF
1 stop9h 36mDelta
Sun 8/186:00 amSDF - ONT
1 stop7h 13mDelta
Deal found 6/19$343

Ontario to Louisville flights leaving soon

Find last-minute flight options from Ontario to Louisville for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,256,981 searches. Data last updated June 20, 2024.
Book one of these great deals on flights from Ontario to Louisville. Users should be sure to double check the price, date, and time of their last-minute flight.
Tue 6/251:55 pmONT - SDF
2 stops24h 14mUnited Airlines
Wed 7/33:35 pmSDF - ONT
1 stop8h 13mUnited Airlines
Deal found 6/19$672
Tue 6/251:55 pmONT - SDF
2 stops20h 28mUnited Airlines
Wed 7/37:00 amSDF - ONT
2 stops13h 28mUnited Airlines
Deal found 6/19$679
Fri 6/286:00 amONT - SDF
1 stop8h 59mAmerican Airlines
Sat 7/63:42 pmSDF - ONT
1 stop8h 33mAmerican Airlines
Deal found 6/20$692
Fri 6/289:24 amONT - SDF
2 stops9h 43mAmerican Airlines
Sat 7/63:42 pmSDF - ONT
1 stop8h 33mAmerican Airlines
Deal found 6/20$697
Tue 6/251:29 pmONT - SDF
1 stop5h 49mUnited Airlines
Wed 7/33:35 pmSDF - ONT
1 stop8h 13mUnited Airlines
Deal found 6/19$721
Tue 6/251:55 pmONT - SDF
2 stops24h 14mUnited Airlines
Wed 7/39:30 amSDF - ONT
3 stops38h 41mUnited Airlines
Deal found 6/19$772
Fri 6/289:24 amONT - SDF
2 stops9h 43mAmerican Airlines
Sat 7/62:34 pmSDF - ONT
2 stops10h 06mAmerican Airlines
Deal found 6/20$773
Fri 6/282:44 pmONT - SDF
1 stop6h 21mAmerican Airlines
Sun 6/308:32 pmSDF - ONT
1 stop6h 27mAmerican Airlines
Deal found 6/19$798
Fri 6/2811:59 pmONT - SDF
1 stop7h 17mAmerican Airlines
Sun 7/76:38 pmSDF - ONT
2 stops8h 31mAmerican Airlines
Deal found 6/19$802

One-way flights to Louisville from Ontario

Search for one-way flight options from Ontario to Louisville. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,256,981 searches. Data last updated June 20, 2024.
Take a look at some of the one-way flights we've detected from Ontario to Louisville. Users in need of a round-trip flight from Ontario to Louisville instead should update the search form at the top of page.
Mon 8/510:00 pmONT - SDF
1 stop8h 53mDelta
Deal found 6/18$173
Mon 8/510:00 pmONT - SDF
2 stops8h 46mDelta
Deal found 6/18$178
Sun 8/410:00 pmONT - SDF
1 stop8h 53mDelta
Deal found 6/19$188
Sun 8/410:00 pmONT - SDF
2 stops8h 46mDelta
Deal found 6/19$193
Sat 7/2711:23 amONT - SDF
1 stop8h 01mDelta
Deal found 6/20$198
Sat 12/711:59 pmONT - SDF
1 stop7h 17mAmerican Airlines
Deal found 6/19$200
Wed 8/149:35 amONT - SDF
2 stops9h 17mAmerican Airlines
Deal found 6/20$203
Fri 7/2611:23 amONT - SDF
1 stop6h 49mDelta
Deal found 6/20$228
Thu 7/41:30 pmONT - SDF
1 stop5h 58mUnited Airlines
Deal found 6/19$243

Find flights from Ontario to Louisville within your budget

Customize your flight search to find flights from Ontario to Louisville 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 3,256,981 searches. Data last updated June 20, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$306 - $546

Route

Depart

Return

Price

OntarioLouisville Intl

ONT - SDF

ONTSDF

Ontario

Tue 8/13

1 stop8h 14m

Louisville Intl

Tue 8/20

1 stop7h 37m

$306

OntarioLouisville Intl

ONT - SDF

ONTSDF

Ontario

Sat 8/3

1 stop8h 01m

Louisville Intl

Sat 8/10

1 stop7h 13m

$307

OntarioLouisville Intl

ONT - SDF

ONTSDF

Ontario

Wed 8/7

1 stop8h 57m

Louisville Intl

Mon 8/12

1 stop6h 31m

$308

OntarioLouisville Intl

ONT - SDF

ONTSDF

Ontario

Tue 8/13

2 stops8h 17m

Louisville Intl

Wed 8/28

1 stop6h 45m

$311

OntarioLouisville Intl

ONT - SDF

ONTSDF

Ontario

Sat 8/3

1 stop7h 07m

Louisville Intl

Sat 8/10

2 stops9h 19m

$312

OntarioLouisville Intl

ONT - SDF

ONTSDF

Ontario

Wed 8/7

2 stops9h 44m

Louisville Intl

Mon 8/12

1 stop6h 31m

$313

OntarioLouisville Intl

ONT - SDF

ONTSDF

Ontario

Tue 8/13

2 stops9h 44m

Louisville Intl

Wed 8/28

2 stops10h 16m

$316

OntarioLouisville Intl

ONT - SDF

ONTSDF

Ontario

Thu 8/8

1 stop5h 58m

Louisville Intl

Tue 8/13

1 stop8h 24m

$416

OntarioLouisville Intl

ONT - SDF

ONTSDF

Ontario

Tue 9/10

2 stops13h 56m

Louisville Intl

Tue 9/17

2 stops12h 33m

$546

Flights are sorted by cheapest first

Deals found on 6/19

How far ahead should I book a flight from Ontario to Louisville?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Louisville. Price data was last updated on June 14, 2024.
Booking 81 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Louisville. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Search Deals

What is the cheapest day to fly from Ontario to Louisville?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Louisville. Price data was last updated on June 16, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Ontario to Louisville flight should consider departing on Friday afternoons when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Ontario to Louisville

Have a flexible travel schedule? Discover the best time to fly to Louisville from Ontario 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.

Temperature and rainfall in Louisville by month

Plan your trip to Louisville by taking into account the average temperature and rainfall totals by month.

SDF

Temperature

35.6 - 78.8 °F

If weather is an important factor for your trip to Louisville, 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 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Louisville

Get insights into the airlines that provide service to Louisville. 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 Louisville. Reviews last updated June 20, 2024.
Read reviews from past customers who have flown Delta, American Airlines and United Airlines from Ontario to Louisville. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
9,296 reviews

Crew

8.6

Overall

8.1

Entertainment

7.3

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

8.1
Very good
9,296 reviews
8.1
Very good
9,296 reviews

Crew

8.6

Overall

8.1

Entertainment

7.3

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

8.0
Very good
10,000 reviews
8.1
Very good
9,296 reviews

Crew

8.6

Overall

8.1

Entertainment

7.3

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

7.4
Good
10,000 reviews
8.1
Very good
9,296 reviews

Crew

8.6

Overall

8.1

Entertainment

7.3

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

7.3
Good
10,000 reviews
8.1
Very good
9,296 reviews

Crew

8.6

Overall

8.1

Entertainment

7.3

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Louisville. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • Can I find flights from Ontario to Louisville for under $400 on Cheapflights?

    Yes, there are multiple flights from Ontario to Louisville for under $400. The cheapest flight booked recently is on Delta for just $306, but on average you can expect to pay $346.

  • Are there last-minute flights available from Ontario to Louisville for under $700?

    There are currently 20+ open flights from Ontario to Louisville within the next 7 days for less than $700.

  • What are the cheapest airlines flying from Ontario to Louisville round-trip?

    Flying on Delta is currently your cheapest option to Louisville, with prices starting at $306. Additional round-trip tickets that might be worth considering are offered by American Airlines and United Airlines, with the lowest prices starting at $308 and $416, respectively. Delta is currently priced 37% below the average price you’ll pay for this route.

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

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $173. American Airlines flights start at $200 while deals on United Airlines start at $243 one-way.

  • What does ONT to SDF mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Ontario Airport to Louisville Intl Airport flight would often be abbreviated as a ONT to SDF flight.

  • Can I find deals for flights from Ontario to Louisville that include extra baggage allowance?

    The amount of baggage you can bring on your Ontario to Louisville flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Ontario to Louisville with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to Louisville flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

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

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

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

  • Can I find deals for flights from Ontario to Louisville that allow pets onboard?

    Many airlines flying from Ontario to Louisville offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Ontario to Louisville?

    Yes, you can often find last-minute deals on Ontario to Louisville flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Ontario to Louisville flight deals updated?

    The Ontario to Louisville flight deals you see on this page were last updated on 6/20.

  • What are the most popular airlines that fly from Ontario to Louisville?

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

    Currently, January is the cheapest month in which you can book a flight from Ontario to Louisville (average of $287). Flying from Ontario to Louisville in April is currently the most expensive (average of $373). 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 Ontario to Louisville
See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from Ontario to Louisville

Discover the top 4 airlines that operate flights from Ontario to Louisville. 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 3,256,981 searches. Data last updated June 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$97Average$124FlexibilityNo cancel feeOn-time65%
DeltaCheapest$319Average$500FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$366Average$488FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$368Average$504FlexibilityNo cancel feeOn-time71%

Search flights from Ontario to Louisville by cabin class

Find flights from Ontario to Louisville, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Weekly flight availability from Ontario to Louisville

Explore weekly flight availability from Ontario to Louisville. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 20, 2024.
Sunday0daily flights
Monday1daily flight
Tuesday1daily flight
Wednesday1daily flight
Thursday1daily flight
Friday1daily flight
Saturday0daily flights
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