ONT - SDF

$171 Find Cheap Flights from Ontario to Louisville - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$304
Typical prices: $390-$566
Multiple Airlines
Mon 12/10Fri 12/14
ONT - SDF • 1 stop
Cheapest one-way
$171
Typical prices: $189-$348
Delta
Mon 12/24
ONT - SDF • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Ontario and Louisville. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
March
Cheapest • 8% price drop
September
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Chicago Midway (MDW)
Cheapest • Avg $364 (round-trip)
Las Vegas Harry Reid Intl (LAS)
Shortest trip • 6h 31m (one-way)
Insights
Insights
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Louisville (ONT-SDF)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Louisville

Thu, Dec 10 - Mon, Dec 14
Multiple Airlines Logo
7:26 pm - 7:19 pmONT  Ontario-SDF Louisville Intl
20h 53m1 stop San Francisco
Multiple Airlines Logo
8:47 am - 11:23 pmSDF  Louisville Intl-ONT Ontario
17h 36m1 stop San Francisco
$304Multiple Airlines
Thu, Dec 10 - Mon, Dec 14
Multiple Airlines Logo
7:26 pm - 7:19 pmONT  Ontario-SDF Louisville Intl
20h 53m1 stop San Francisco
Multiple Airlines Logo
11:39 am - 10:45 amSDF  Louisville Intl-ONT Ontario
26h 06m2 stops New Orleans Louis Armstrong Denver Intl
$335Multiple Airlines
Tue, Oct 27 - Wed, Oct 28
Southwest Logo
1:35 pm - 11:00 pmONT  Ontario-SDF Louisville Intl
6h 25m1 stop Las Vegas Harry Reid Intl
Southwest Logo
3:00 pm - 8:50 pmSDF  Louisville Intl-ONT Ontario
8h 50m1 stop Dallas Love Field
$341Southwest
Tue, Oct 20 - Tue, Nov 3
American Airlines Logo
2:22 pm - 11:27 pmONT  Ontario-SDF Louisville Intl
6h 05m1 stop Dallas/Fort Worth
American Airlines Logo
6:01 am - 9:40 amSDF  Louisville Intl-ONT Ontario
6h 39m1 stop Dallas/Fort Worth
$341American Airlines
Sat, Oct 17 - Wed, Oct 21
American Airlines Logo
6:00 am - 3:27 pmONT  Ontario-SDF Louisville Intl
6h 27m1 stop Dallas/Fort Worth
American Airlines Logo
6:00 am - 11:53 amSDF  Louisville Intl-ONT Ontario
8h 53m1 stop Dallas/Fort Worth
$341American Airlines
Thu, Oct 22 - Wed, Oct 28
Delta Logo
11:15 pm - 8:57 amONT  Ontario-SDF Louisville Intl
6h 42m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:00 am - 11:06 amSDF  Louisville Intl-ONT Ontario
8h 06m1 stop Atlanta Hartsfield-Jackson
$341Delta
Tue, Oct 27 - Wed, Oct 28
Southwest Logo
1:35 pm - 11:00 pmONT  Ontario-SDF Louisville Intl
6h 25m1 stop Las Vegas Harry Reid Intl
Southwest Logo
2:05 pm - 8:50 pmSDF  Louisville Intl-ONT Ontario
9h 45m2 stops Chicago Midway Dallas Love Field
$346Southwest
Tue, Oct 27 - Wed, Oct 28
United Airlines Logo
5:00 am - 6:32 pmONT  Ontario-SDF Louisville Intl
10h 32m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
7:00 am - 12:33 pmSDF  Louisville Intl-ONT Ontario
8h 33m2 stops Chicago O'Hare Intl Denver Intl
$351United Airlines
Fri, Nov 6 - Sat, Nov 7
Delta Logo
12:16 pm - 11:59 pmONT  Ontario-SDF Louisville Intl
8h 43m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:05 am - 11:06 amSDF  Louisville Intl-ONT Ontario
7h 01m1 stop Atlanta Hartsfield-Jackson
$353Delta
Fri, Nov 6 - Sun, Nov 8
United Airlines Logo
1:32 pm - 10:24 pmONT  Ontario-SDF Louisville Intl
5h 52m1 stop Denver Intl
United Airlines Logo
5:10 am - 12:33 pmSDF  Louisville Intl-ONT Ontario
10h 23m2 stops Chicago O'Hare Intl Denver Intl
$421United Airlines
Booking Insights

Price, demand and travel trends for Ontario to Louisville flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What's the cheapest day of the week to fly from Ontario to Louisville?

Based on deals KAYAK users found in the last 12 months, Tuesday is the cheapest day of the week to fly from Ontario to Louisville. It’s 23% cheaper than the average day, while Sunday is the most expensive, with prices 19% higher.

What’s the cheapest month to fly from Ontario to Louisville?

•March is the cheapest month to fly from Ontario to Louisville at $427 round-trip.
•January ($976) and April ($585) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 128% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

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Key details for Ontario to Louisville flights

Low season

February

Cheapest flight

$171
Beat the crowds with an average 23% drop in travelers.
The most popular month to fly with an average 106% increase in travelers.
One-way flight from Ontario to Louisville

When to book flights from Ontario to Louisville

Are your dates flexible? Find out the best times to travel from Ontario to Louisville based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Ontario to Louisville flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Ontario to Louisville?

    Two cabin classes are available on flights from Ontario to Louisville:

    • Economy Class
    • First Class

  • How long is a flight from Ontario to Louisville?

    A nonstop flight from Ontario to Louisville takes 00m, covering 1,791 miles.

  • Do I need a passport to fly from Ontario to Louisville?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a Ontario to Louisville flight?

    Round-trip flights from Ontario to Louisville range from $390 to $566, with an average of $466 over the past 12 months. Anything below $390 counts as a good deal.

  • Have flight prices from Ontario to Louisville changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $304 to $2,430. That means the highest observed fare was about 8x higher than the lowest one.

  • How are flight prices from Ontario to Louisville looking right now?

    One-way fares from Ontario to Louisville are currently in line with typical prices for this route. Average one-way fares are about $281.

  • What car rental options are available at Louisville Intl Airport (SDF)?

    Louisville Intl Airport (SDF) hosts 5 major car rental companies, with daily rates starting from around $32 for economy cars. Top options include:

    • Hertz
    • Dollar
    • Alamo
    • Thrifty
    • Budget

  • Which airports can I use when flying from Ontario to Louisville?

    Flights from Ontario to Louisville usually depart from Ontario (ONT) and arrive at Louisville Intl (SDF).

  • Which airports do connecting flights from Ontario to Louisville pass through?

    One-stop flights from Ontario to Louisville most commonly connect through:

    • Dallas/Fort Worth (DFW) - 39% of one-stop connections
    • Denver Intl (DEN) - 24% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) - 15% of one-stop connections
    • Las Vegas Harry Reid Intl (LAS) - 13% of one-stop connections

  • Can I save money by using flexible dates for flights from Ontario to Louisville?

    Yes. Flexible dates can save you up to 36% on flights from Ontario to Louisville. Tuesday is the cheapest departure day at $359 round-trip on average, while Sunday is the most expensive at $556, a difference of $197.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Ontario to Louisville?

    Flying via Las Vegas Harry Reid Intl (LAS) gives the shortest average 1-stop total travel time at 6h 31m, compared with 6h 44m via Denver Intl (DEN) and 6h 53m via Phoenix Sky Harbor Intl (PHX).

  • What is the time difference between Ontario and Louisville?

    Louisville is 3 hours ahead of Ontario (Eastern Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Louisville?

    Some of the most popular sights in Louisville are Louisville Waterfront Park and Masonic Widows and Orphans Home. These are among the most viewed places in Louisville on KAYAK.

Your guide to booking Ontario to Louisville flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Tuesday departure and avoid flying on Sunday. On this route, Tuesday flights average $359, about $197 less than Sunday fares (35% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Ontario to Louisville trip for March. Fares historically average $427 round-trip in that month - typically $549 less than the most expensive month, which is January (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Louisville Intl Airport.

    • Baymont by Wyndham Louisville Airport South
    • Crowne Plaza Louisville Airport Expo Ctr By IHG
    • Fairfield by Marriott Inn & Suites Louisville Airport

More options for your flight from Ontario to Louisville

Complete your trip to Louisville with a hotel stay or car rental

Car rentals in Louisville
Hotels in Louisville
Vacations in Louisville