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$168+ Cheap flights from Louisville to Ontario (SDF - ONT)

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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ONT
Jan 3 — Jan 101
Fri 1/3
Fri 1/10
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 December 29, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$336
(Delta)

One-way from

$168
(Delta)

Popular in

May

Cheapest in

August

Average price

$576
Provider with most accurate pricing for Louisville Intl-Ontario flight deals.
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Provider most trusted by Cheapflights users for Louisville Intl-Ontario flights.
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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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High demand for flights, 11% potential price rise
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Best time to find cheap flights, 3% potential price drop
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Average for round-trip flights in December 2024
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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 December 29, 2024.

This Delta deal was found by Cheapflights users on 12/28. 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.
Sat 12/286:29 pmSDF - ONT
1 stop8h 12mDelta
Sun 1/510:29 pmONT - SDF
1 stop8h 15mDelta
Deal found 12/28$926
This American Airlines deal was found by Cheapflights users on 12/28. 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.
Sun 12/296:14 pmSDF - ONT
1 stop7h 14mAmerican Airlines
Sun 12/2912:59 amONT - SDF
1 stop6h 20mAmerican Airlines
Deal found 12/28$1,001
This United Airlines deal was found by Cheapflights users on 12/27. 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.
Tue 12/313:30 pmSDF - ONT
1 stop8h 19mUnited Airlines
Thu 1/25:05 amONT - SDF
2 stops8h 57mUnited Airlines
Deal found 12/27$1,209
This Alaska Airlines deal was found by Cheapflights users on 12/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3111:16 amSDF - ONT
2 stops11h 21mAlaska Airlines
Thu 1/26:03 pmONT - SDF
2 stops13h 48mAlaska Airlines
Deal found 12/28$3,160

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 2,558,603 searches. Data last updated December 29, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 1/28

6:00 am-11:50 am

1 stop8h 50m

Ontario

Tue 2/4

7:05 am-5:43 pm

1 stop7h 38m

$336

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Mon 1/20

5:00 am-9:56 am

1 stop7h 56m

Ontario

Tue 1/28

10:56 am-8:06 pm

1 stop6h 10m

$363

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Mon 1/20

3:25 pm-8:51 pm

1 stop8h 26m

Ontario

Thu 1/23

5:10 am-2:26 pm

1 stop6h 16m

$476

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 1/28

8:36 am-8:13 pm

2 stops14h 37m

Ontario

Tue 2/4

6:00 am-9:54 pm

2 stops12h 54m

$516

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Mon 6/23

12:00 pm-6:25 pm

2 stops9h 25m

Ontario

Fri 6/27

8:00 am-7:55 pm

2 stops8h 55m

$596

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 1/28

7:05 am-11:50 am

1 stop7h 45m

$168

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 1/30

6:18 pm-10:16 pm

1 stop6h 58m

$195

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 1/28

3:30 pm-9:57 pm

1 stop9h 27m

$213

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 1/28

11:26 am-10:34 am

3 stops26h 08m

$345

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/29

Compare providers for flights from Louisville to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Louisville to Ontario in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Louisville-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Louisville-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Louisville-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Louisville-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Louisville-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Travel insights for flights from Louisville to Ontario

Get recent, data-driven insights about flights from Louisville to Ontario including ideal travel times, pricing trends, and more.

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

Currently, August is the cheapest month in which you can book a flight from Louisville to Ontario (average of $246). Flying from Louisville to Ontario in March is currently the most expensive (average of $317). 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.

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

Find hourly flight availability from Louisville to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 29, 2024.

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 evening, which can drop the price by up to 38% versus a flight at noon.

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 Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 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 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 December 29, 2024.
Peruse reviews from past customers who have flown with Delta, United Airlines and Alaska 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.
Southwest
8.1
Very good
4,722 reviews

Entertainment

7.7

Food

7.2

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,722 reviews
Southwest
8.1
Very good
4,722 reviews

Entertainment

7.7

Food

7.2

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,583 reviews
Southwest
8.1
Very good
4,722 reviews

Entertainment

7.7

Food

7.2

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,546 reviews
Southwest
8.1
Very good
4,722 reviews

Entertainment

7.7

Food

7.2

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
8,985 reviews
Southwest
8.1
Very good
4,722 reviews

Entertainment

7.7

Food

7.2

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,722 reviews

Entertainment

7.7

Food

7.2

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

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

    Delta, at $336, was found to be the cheapest airline from Louisville to Ontario.Alternate airlines to your destination round-trip include American Airlines and United Airlines. Delta is currently priced 38% below the average price you’ll pay for this route.

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

    $168 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 $195 and $213, respectively.

  • 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 Ontario?

    Currently, August is the cheapest month in which you can book a flight from Louisville to Ontario (average of $246). Flying from Louisville to Ontario in March is currently the most expensive (average of $317). 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.

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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 2,558,603 searches. Data last updated December 29, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$257Average$517FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$326Average$516FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$389Average$536FlexibilityNo cancel feeOn-time63%
DeltaCheapest$416Average$606FlexibilityNo cancel feeOn-timeN/A
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