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Cheap flights from Louisville to Ontario (SDF - ONT) from $138

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 8/15. 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.
SDF — ONT
Jun 18 — Jun 251
From?
To?
Tue 6/18
Tue 6/25
1 adult, Economy
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Cheap flight deals from Louisville to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Ontario (ONT). 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 13, 2024.

Popular in

May

Cheapest in

August

Round-trip from

$238

One-way from

$213
High demand for flights, 23% potential price rise
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Best time to find cheap flights, 48% potential price drop
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From Louisville Intl to Ontario
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One-way flight from Louisville Intl to Ontario
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What is the cheapest day to fly round-trip from Louisville to Ontario?

It’s generally more expensive to depart on a Wednesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

Travelers have found it’s best to book a flight 59 days in advance to save up to 67% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 59 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Louisville to Ontario 1-2 weeks in advance for as low as $172, or $262 for flights within the next 24 hours.

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

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, September can be a great choice for travel to Ontario. Flights to Ontario from Louisville in September are about $238 on average during September, but can be found for as low as $87.

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

When flying from Louisville to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 70% versus a flight at noon.

Cheap Louisville to Ontario flights in June & July 2024

Find cheap flight options from Louisville to Ontario specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,214,720 searches. Prices were last updated on June 13, 2024.
Scroll through some of the best deals on flights from Louisville to Ontario in 2024. If these deals don't appeal to you, be sure to come back soon for more options.
Mon 7/298:35 pmSDF - ONT
1 stop6h 14mAmerican Airlines
Fri 8/211:59 pmONT - SDF
1 stop7h 17mAmerican Airlines
Deal found 6/12$361
Mon 7/298:35 pmSDF - ONT
1 stop6h 14mAmerican Airlines
Fri 8/29:19 amONT - SDF
2 stops10h 16mAmerican Airlines
Deal found 6/12$366
Wed 7/175:55 pmSDF - ONT
1 stop8h 02mDelta
Tue 7/3011:23 amONT - SDF
1 stop8h 01mDelta
Deal found 6/13$386
Fri 7/268:35 pmSDF - ONT
1 stop6h 14mAmerican Airlines
Mon 7/2911:59 pmONT - SDF
1 stop7h 17mAmerican Airlines
Deal found 6/12$426
Thu 7/113:27 pmSDF - ONT
1 stop7h 00mDelta
Sat 7/2011:23 amONT - SDF
1 stop8h 01mDelta
Deal found 6/13$438
Tue 7/168:35 pmSDF - ONT
1 stop6h 14mAmerican Airlines
Wed 7/318:10 amONT - SDF
1 stop8h 34mAmerican Airlines
Deal found 6/13$461
Sun 6/305:55 amSDF - ONT
1 stop7h 08mAmerican Airlines
Mon 8/511:59 pmONT - SDF
1 stop7h 17mAmerican Airlines
Deal found 6/12$467
Fri 7/123:35 pmSDF - ONT
1 stop8h 13mUnited Airlines
Fri 7/191:30 pmONT - SDF
1 stop5h 58mUnited Airlines
Deal found 6/12$476
Sat 7/138:35 pmSDF - ONT
1 stop6h 14mAmerican Airlines
Mon 7/1510:38 pmONT - SDF
1 stop9h 08mAmerican Airlines
Deal found 6/12$486

Louisville to Ontario 2024 flight deals

Discover exclusive flight deals for travel between Louisville and Ontario in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,214,720 searches. Data last updated June 13, 2024.
Scroll through some of the best deals on flights from Louisville to Ontario in 2024. If these deals don't appeal to you, be sure to come back soon for more options.
Tue 8/276:00 amSDF - ONT
1 stop6h 54mAmerican Airlines
Wed 9/410:58 pmONT - SDF
1 stop9h 20mAmerican Airlines
Deal found 6/11$212
Tue 8/278:20 amSDF - ONT
2 stops10h 48mAmerican Airlines
Wed 9/410:58 pmONT - SDF
1 stop7h 10mAmerican Airlines
Deal found 6/11$217
Tue 8/278:20 amSDF - ONT
2 stops10h 48mAmerican Airlines
Wed 9/49:41 amONT - SDF
2 stops8h 45mAmerican Airlines
Deal found 6/11$222
Mon 8/126:42 pmSDF - ONT
1 stop6h 45mAmerican Airlines
Fri 8/1611:59 pmONT - SDF
1 stop7h 17mAmerican Airlines
Deal found 6/12$302
Mon 8/128:27 pmSDF - ONT
1 stop6h 31mAmerican Airlines
Fri 8/169:35 amONT - SDF
2 stops9h 17mAmerican Airlines
Deal found 6/12$307
Sat 8/103:35 pmSDF - ONT
1 stop8h 13mUnited Airlines
Sun 8/256:25 pmONT - SDF
1 stop17h 07mUnited Airlines
Deal found 6/12$331
Thu 10/316:00 amSDF - ONT
1 stop7h 37mDelta
Mon 11/1110:00 pmONT - SDF
1 stop8h 31mDelta
Deal found 6/12$338
Mon 7/298:35 pmSDF - ONT
1 stop6h 14mAmerican Airlines
Fri 8/211:59 pmONT - SDF
1 stop7h 17mAmerican Airlines
Deal found 6/12$361
Wed 9/43:35 pmSDF - ONT
2 stops12h 10mUnited Airlines
Sat 9/75:15 amONT - SDF
1 stop6h 17mUnited Airlines
Deal found 6/12$362

Louisville to Ontario flights leaving soon

Find last-minute flight options from Louisville to Ontario 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 3,214,720 searches. Data last updated June 13, 2024.
Users seeking a last-minute flight from Louisville to Ontario should consider booking one of these fares. Users should examine the flight details to ensure there are no surprises.
Wed 6/193:45 pmSDF - ONT
1 stop8h 29mUnited Airlines
Sun 6/235:15 amONT - SDF
1 stop6h 17mUnited Airlines
Deal found 6/12$798
Wed 6/1911:00 amSDF - ONT
2 stops14h 27mUnited Airlines
Sun 6/235:15 amONT - SDF
1 stop6h 17mUnited Airlines
Deal found 6/12$830
Fri 6/213:28 pmSDF - ONT
1 stop8h 20mUnited Airlines
Sun 6/235:15 amONT - SDF
1 stop6h 17mUnited Airlines
Deal found 6/12$866
Fri 6/213:28 pmSDF - ONT
1 stop8h 20mUnited Airlines
Sun 6/235:15 amONT - SDF
1 stop6h 17mUnited Airlines
Deal found 6/11$877
Wed 6/193:45 pmSDF - ONT
1 stop8h 29mUnited Airlines
Wed 6/265:15 amONT - SDF
1 stop6h 17mUnited Airlines
Deal found 6/11$1,153
Tue 6/182:30 pmSDF - ONT
2 stops12h 29mAlaska Airlines
Thu 6/204:24 pmONT - SDF
2 stops15h 26mAlaska Airlines
Deal found 6/12$1,186
Fri 6/216:39 pmSDF - ONT
1 stop6h 30mAmerican Airlines
Sun 6/236:00 amONT - SDF
1 stop9h 01mAmerican Airlines
Deal found 6/12$1,282
Tue 6/183:28 pmSDF - ONT
1 stop8h 20mUnited Airlines
Thu 6/205:15 amONT - SDF
1 stop6h 17mUnited Airlines
Deal found 6/12$1,287
Wed 6/1911:26 amSDF - ONT
2 stops15h 33mAlaska Airlines
Wed 6/266:00 amONT - SDF
2 stops13h 44mAlaska Airlines
Deal found 6/11$1,296

One-way flights to Ontario from Louisville

Search for one-way flight options from Louisville to Ontario. 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 3,214,720 searches. Data last updated June 13, 2024.
Take a look at some of the best available options we've come across on one-way flights from Louisville to Ontario. For those needing a return trip from Louisville, there is a search form available above.
Thu 8/156:00 amSDF - ONT
1 stop7h 13mDelta
Deal found 6/12$138
Tue 8/136:00 amSDF - ONT
2 stops13h 08mAmerican Airlines
Deal found 6/12$156
Thu 6/275:55 pmSDF - ONT
1 stop8h 05mDelta
Deal found 6/12$174
Thu 6/272:20 pmSDF - ONT
2 stops11h 40mDelta
Deal found 6/12$179
Thu 7/186:00 amSDF - ONT
1 stop7h 13mDelta
Deal found 6/12$198
Sat 8/33:27 pmSDF - ONT
2 stops11h 32mDelta
Deal found 6/12$213
Mon 8/128:00 amSDF - ONT
1 stop18h 58mAmerican Airlines
Deal found 6/12$257
Sat 8/310:46 amSDF - ONT
2 stops10h 36mAmerican Airlines
Deal found 6/12$258
Wed 6/268:03 amSDF - ONT
2 stops10h 48mAmerican Airlines
Deal found 6/12$298

Find flights from Louisville to Ontario within your budget

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 3,214,720 searches. Data last updated June 13, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$212 - $642

Route

Depart

Return

Price

Louisville IntlOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 8/27

1 stop6h 54m

Ontario

Wed 9/4

1 stop9h 20m

$212

Louisville IntlOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 8/27

2 stops10h 48m

Ontario

Wed 9/4

1 stop7h 10m

$217

Louisville IntlOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 8/27

2 stops10h 48m

Ontario

Wed 9/4

2 stops8h 45m

$222

Louisville IntlOntario

SDF - ONT

SDFONT

Louisville Intl

Mon 8/12

1 stop6h 45m

Ontario

Fri 8/16

1 stop7h 17m

$302

Louisville IntlOntario

SDF - ONT

SDFONT

Louisville Intl

Sat 8/10

1 stop8h 13m

Ontario

Sun 8/25

1 stop17h 07m

$331

Louisville IntlOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 10/31

1 stop7h 37m

Ontario

Mon 11/11

1 stop8h 31m

$338

Louisville IntlOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 9/4

2 stops12h 10m

Ontario

Sat 9/7

1 stop6h 17m

$362

Louisville IntlOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 7/17

1 stop7h 13m

Ontario

Wed 7/31

1 stop8h 54m

$386

Louisville IntlOntario

SDF - ONT

SDFONT

Louisville Intl

Sun 9/1

2 stops14h 29m

Ontario

Wed 9/4

2 stops12h 26m

$642

Flights are sorted by cheapest first

Deals found on 6/11

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

Use this chart to determine the cheapest time to fly round-trip from Louisville to Ontario. Price data was last updated on June 9, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Louisville to Ontario flight should consider departing on Thursday afternoons when fares are most often at their lowest. Monday mornings 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 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.

Temperature and rainfall in Ontario by month

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

LAX

Temperature

57.2 - 73.4 °F

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August 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 December, when temperatures are typically at their lowest (around 53.6 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 June 13, 2024.
Peruse reviews from past customers who have flown with Delta, Alaska Airlines and American Airlines from Louisville to Ontario to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,272 reviews

Comfort

7.9

Overall

8.1

Entertainment

7.3

Crew

8.6

Food

7.3

Boarding

8.2

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

Alaska Airlines
8.1
Very good
9,272 reviews
Alaska Airlines
8.1
Very good
9,272 reviews

Comfort

7.9

Overall

8.1

Entertainment

7.3

Crew

8.6

Food

7.3

Boarding

8.2

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

Delta
8.0
Very good
10,000 reviews
Alaska Airlines
8.1
Very good
9,272 reviews

Comfort

7.9

Overall

8.1

Entertainment

7.3

Crew

8.6

Food

7.3

Boarding

8.2

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

United Airlines
7.4
Good
10,000 reviews
Alaska Airlines
8.1
Very good
9,272 reviews

Comfort

7.9

Overall

8.1

Entertainment

7.3

Crew

8.6

Food

7.3

Boarding

8.2

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

American Airlines
7.3
Good
10,000 reviews
Alaska Airlines
8.1
Very good
9,272 reviews

Comfort

7.9

Overall

8.1

Entertainment

7.3

Crew

8.6

Food

7.3

Boarding

8.2

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

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.

  • Can I find flights from Louisville to Ontario for under $300 on Cheapflights?

    Yes, there are multiple flights from Louisville to Ontario for under $300. The cheapest flight booked recently is on American Airlines for just $212, but on average you can expect to pay $363.

  • Are there last-minute flights available from Louisville to Ontario for under $800?

    There are currently 15+ open flights from Louisville to Ontario within the next 7 days for less than $800.

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

    American Airlines, at $212, was found to be the cheapest airline from Louisville to Ontario.Alternate airlines to your destination round-trip include United Airlines and Delta. American Airlines is currently priced 58% below the average price you’ll pay for this route.

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

    $138 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $156 and $418, respectively.

  • What does SDF to ONT mean?

    Louisville Intl Airport is SDF and Ontario Airport is ONT. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

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

    The amount of baggage you can bring on your Louisville to Ontario 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 Louisville to Ontario with specific airlines?

    Yes, Cheapflights allows you to browse and filter Louisville to Ontario 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 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.

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

    Many airlines flying from Louisville to Ontario 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 Louisville to Ontario?

    Yes, you can often find last-minute deals on Louisville to Ontario 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 Louisville to Ontario flight deals updated?

    The Louisville to Ontario flight deals you see on this page were last updated on 6/12.

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

    Consider American Airlines, Delta or Spirit Airlines when booking your flight. These represent the most popular airlines when flying from Louisville to Ontario.

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

    Currently, October is the cheapest month in which you can book a flight from Louisville to Ontario (average of $238). Flying from Louisville to Ontario in July is currently the most expensive (average of $318). 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 4 airlines flying from Louisville to Ontario

Discover the top 4 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 3,214,720 searches. Data last updated June 13, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$97Average$212FlexibilityNo cancel feeOn-time65%
DeltaCheapest$306Average$464FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$377Average$557FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$389Average$517FlexibilityNo cancel feeOn-time69%
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Honolulu to Kaua'i flights
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Search flights from Louisville to Ontario by cabin class

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