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

American Airlines, at $324, was found to be the cheapest airline from Louisville to Ontario.Alternate airlines to your destination round-trip include Delta and Southwest. American Airlines is currently priced 40% below the average price you’ll pay for this route.

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

$171 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on United Airlines and Southwest, with prices starting from $198 and $214, respectively.

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

Travelers seeking maximum savings on their Louisville to Ontario flight should consider departing on Wednesday evenings 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.

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

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

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 115% 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 $232, or $334 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, May can be a great choice for travel to Ontario. Flights to Ontario from Louisville in May are about $310 on average during May, but can be found for as low as $96.

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.

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.

$153+ Flights from Louisville to Ontario

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Louisville to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Louisville to Ontario

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	May
Cheapest in	August
Round-trip from	$324 (American Airlines)
One-way from	$171 (American Airlines)

Provider with most accurate pricing for Louisville Intl-Ontario flight deals.

Search Deals

Provider most trusted by Cheapflights users for Louisville Intl-Ontario flights.

Search Deals

High demand for flights, 29% potential price rise

Search Deals

Best time to find cheap flights, 40% potential price drop

Search Deals

From Louisville Intl to Ontario

Search Deals

One-way flight from Louisville Intl to Ontario

Search Deals

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 5, 2024.

Tue 12/241:40 pmSDF - ONT

2 stops9h 00mSouthwest

Thu 12/266:05 amONT - SDF

1 stop5h 50mSouthwest

Deal found 12/3

$482

Tue 12/311:58 pmSDF - ONT

1 stop8h 43mDelta

Fri 1/107:05 amONT - SDF

1 stop7h 40mDelta

Deal found 12/5

$505

Tue 12/247:01 amSDF - ONT

2 stops12h 40mAmerican Airlines

Tue 12/317:15 amONT - SDF

1 stop7h 24mAmerican Airlines

Deal found 12/4

$562

Tue 12/243:30 pmSDF - ONT

1 stop8h 19mUnited Airlines

Tue 12/315:05 amONT - SDF

1 stop6h 29mUnited Airlines

Deal found 12/4

$586

Fri 12/1311:02 amSDF - ONT

2 stops11h 58mAlaska Airlines

Sun 12/156:00 amONT - SDF

2 stops12h 23mAlaska Airlines

Deal found 12/4

$856

Best flights from Louisville to Ontario
Discover carefully curated flight deals from Louisville to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 5, 2024.

Thu 1/166:18 pmSDF - ONT

1 stop8h 40mAmerican Airlines

Tue 1/2110:56 amONT - SDF

1 stop6h 10mAmerican Airlines

Deal found 12/5

$324

Sat 1/251:25 pmSDF - ONT

2 stops12h 27mDelta

Fri 1/316:00 amONT - SDF

2 stops14h 25mDelta

Deal found 12/4

$352

Fri 1/2411:15 amSDF - ONT

2 stops8h 45mSouthwest

Sun 1/269:40 amONT - SDF

2 stops9h 10mSouthwest

Deal found 12/4

$408

Wed 1/83:30 pmSDF - ONT

1 stop9h 27mUnited Airlines

Mon 1/135:10 amONT - SDF

1 stop6h 16mUnited Airlines

Deal found 12/5

$414

Thu 1/2310:56 amSDF - ONT

2 stops14h 43mAlaska Airlines

Fri 1/316:00 amONT - SDF

2 stops12h 54mAlaska Airlines

Deal found 12/3

$490

Last-minute flights from Louisville to Ontario
Discover last-minute flight deals from Louisville to Ontario. Data last updated December 5, 2024 and is based on user searches.

Thu 12/123:20 pmSDF - ONT

1 stop8h 27mUnited Airlines

Thu 12/195:05 amONT - SDF

1 stop6h 29mUnited Airlines

Deal found 12/5

$787

Fri 12/131:00 pmSDF - ONT

1 stop7h 20mSouthwest

Sun 1/55:05 amONT - SDF

2 stops6h 50mSouthwest

Deal found 12/3

$666

Fri 12/137:05 amSDF - ONT

1 stop7h 56mAmerican Airlines

Sun 1/511:59 pmONT - SDF

1 stop7h 18mAmerican Airlines

Deal found 12/3

$676

Fri 12/1311:02 amSDF - ONT

2 stops11h 58mAlaska Airlines

Sun 12/156:00 amONT - SDF

2 stops12h 23mAlaska Airlines

Deal found 12/4

$856

Wed 1/83:30 pmSDF - ONT

1 stop9h 27mUnited Airlines

Mon 1/135:10 amONT - SDF

1 stop6h 16mUnited Airlines

Deal found 12/5

$414

Thu 1/166:18 pmSDF - ONT

1 stop8h 40mAmerican Airlines

Tue 1/2110:56 amONT - SDF

1 stop6h 10mAmerican Airlines

Deal found 12/5

$324

Thu 1/2310:56 amSDF - ONT

2 stops14h 43mAlaska Airlines

Fri 1/316:00 amONT - SDF

2 stops12h 54mAlaska Airlines

Deal found 12/3

$490

Fri 1/2411:15 amSDF - ONT

2 stops8h 45mSouthwest

Sun 1/269:40 amONT - SDF

2 stops9h 10mSouthwest

Deal found 12/4

$408

Sat 1/251:25 pmSDF - ONT

2 stops12h 27mDelta

Fri 1/316:00 amONT - SDF

2 stops14h 25mDelta

Deal found 12/4

$352

One-way flights from Louisville to Ontario
Search for one-way flight options from Louisville to Ontario. Find affordable one-way fares based on user searches. Data last updated December 5, 2024.

Thu 1/96:18 pmSDF - ONT

1 stop6h 58mAmerican Airlines

Deal found 12/4

$171

Tue 1/73:30 pmSDF - ONT

1 stop9h 27mUnited Airlines

Deal found 12/5

$198

Fri 1/34:20 pmSDF - ONT

1 stop10h 30mSouthwest

Deal found 12/4

$214

Tue 1/148:36 amSDF - ONT

2 stops14h 37mAlaska Airlines

Deal found 12/4

$224

Mon 1/65:01 pmSDF - ONT

1 stop8h 51mDelta

Deal found 12/4

$238

Mon 12/99:53 pmSDF - ONT

3 stops28h 08mMultiple Airlines

Deal found 12/4

$413

Find flights from Louisville to Ontario within your budget

Fly from

Fly to

Route

Depart

Return

Price

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 1/16

6:18 pm-11:58 pm

1 stop8h 40m

Ontario

Tue 1/21

10:56 am-8:06 pm

1 stop6h 10m

$324

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Sat 1/25

1:25 pm-10:52 pm

2 stops12h 27m

Ontario

Fri 1/31

6:00 am-11:25 pm

2 stops14h 25m

$352

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Fri 1/24

11:15 am-5:00 pm

2 stops8h 45m

Ontario

Sun 1/26

9:40 am-9:50 pm

2 stops9h 10m

$408

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 1/8

3:30 pm-9:57 pm

1 stop9h 27m

Ontario

Mon 1/13

5:10 am-2:26 pm

1 stop6h 16m

$414

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 1/23

10:56 am-10:39 pm

2 stops14h 43m

Ontario

Fri 1/31

6:00 am-9:54 pm

2 stops12h 54m

$490

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 3/5

6:16 pm-9:59 pm

1 stop6h 43m

$153

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 1/14

9:00 am-12:41 pm

1 stop6h 41m

$198

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Fri 1/3

4:20 pm-11:50 pm

1 stop10h 30m

$214

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 1/14

8:36 am-8:13 pm

2 stops14h 37m

$224

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Mon 1/6

5:01 pm-10:52 pm

1 stop8h 51m

$238

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/5

Compare providers for flights from Louisville to Ontario

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.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust 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, September is the cheapest month in which you can book a flight from Louisville to Ontario (average of $236). Flying from Louisville to Ontario in December is currently the most expensive (average of $298). 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?

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

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

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

Peruse reviews from past customers who have flown with Southwest, 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.

Southwest

8.1

Very good

4,934 reviews

Reviews

1 / 10

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

Southwest

8.1

Very good

4,934 reviews

Southwest

8.1

Very good

4,934 reviews

Reviews

1 / 10

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

Alaska Airlines

8.0

Very good

9,519 reviews

Southwest

8.1

Very good

4,934 reviews

Reviews

1 / 10

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

Delta

8.0

Very good

8,682 reviews

Southwest

8.1

Very good

4,934 reviews

Reviews

1 / 10

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

United Airlines

7.4

Good

9,134 reviews

Southwest

8.1

Very good

4,934 reviews

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

4,934 reviews

Reviews

1 / 10

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

Related info for your journey

What are the cheapest airlines flying from Louisville to Ontario round-trip?
American Airlines, at $324, was found to be the cheapest airline from Louisville to Ontario.Alternate airlines to your destination round-trip include Delta and Southwest. American Airlines is currently priced 40% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Louisville to Ontario one-way?
$171 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on United Airlines and Southwest, with prices starting from $198 and $214, 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, September is the cheapest month in which you can book a flight from Louisville to Ontario (average of $236). Flying from Louisville to Ontario in December is currently the most expensive (average of $298). 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.