Ontario

$82+ Cheap flights from Kentucky to Ontario (ONT)

SDF — ONT
Sep 23 — Sep 301
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Cheap flight deals from Kentucky to Ontario

Cheapest flights from Kentucky to Ontario

Sat 9/123:14 pm -
1 stop10h 33m
Mon 9/146:15 am -
1 stop11h 22m
Deal found 8/19$161
Wed 9/233:14 pm -
1 stop21h 16m
Mon 9/286:15 am -
1 stop6h 03m
Deal found 8/19$164
Sat 9/512:55 pm -
1 stop12h 55m
Fri 9/116:15 am -
1 stop11h 22m
Deal found 8/19$165
Thu 9/243:14 pm -
1 stop10h 33m
Mon 9/2811:45 am -
1 stop24h 33m
Deal found 8/24$167
Fri 8/212:41 pm -
1 stop8h 46m
Mon 8/2410:49 am -
1 stop23h 21m
Deal found 8/19$170
Thu 8/2712:55 pm -
1 stop12h 55m
Sun 8/306:00 am -
1 stop28h 10m
Deal found 8/19$174
Thu 8/202:41 pm -
1 stop27h 41m
Mon 8/246:00 am -
1 stop28h 10m
Deal found 8/19$176
Wed 9/233:14 pm -
1 stop10h 33m
Fri 10/3011:52 am -
1 stop24h 24m
Deal found 8/23$177
Wed 10/213:14 pm -
1 stop10h 36m
Tue 10/2711:52 am -
1 stop24h 24m
Deal found 8/21$179
Fri 9/118:32 pm -
1 stop15h 58m
Mon 9/146:15 am -
1 stop11h 22m
Deal found 8/22$182
Sat 9/123:14 pm -
1 stop10h 33m
Sat 9/196:15 am -
1 stop6h 03m
Deal found 8/21$189
Thu 10/13:14 pm -
1 stop10h 33m
Sat 10/316:25 am -
1 stop5h 51m
Deal found 8/21$190

Find flight deals from Kentucky to Ontario

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$161
(Kiwi.com)

One-way from

$82
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$422
Provider with most accurate pricing for Louisville Intl-Los Angeles flight deals.
Provider most trusted by Cheapflights users for Louisville Intl-Los Angeles flights.
From Kentucky to Ontario
One-way flight from Kentucky to Ontario
Highest demand for flights based on searches. 2% potential increase in price ($11 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Average for round-trip flights in August 2026

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Kentucky to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

NashvilleOntario

BNA Nashville Intl - ONT Ontario

BNAONT

Nashville Intl

Thu 8/27

7:39 pm-11:34 pm

1 stop5h 55m

Ontario

Thu 9/3

1:06 pm-10:50 pm

1 stop7h 44m

$263

NashvilleOntario

BNA Nashville Intl - ONT Ontario

BNAONT

Nashville Intl

Thu 11/5

5:00 pm-10:11 pm

1 stop7h 11m

Ontario

Sun 11/8

11:15 pm-9:49 am

1 stop8h 34m

$263

NashvilleOntario

BNA Nashville Intl - ONT Ontario

BNAONT

Nashville Intl

Thu 10/15

4:05 pm-6:25 pm

Nonstop4h 20m

Ontario

Wed 10/21

11:55 pm-10:00 am

1 stop8h 05m

$347

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Tue 11/3

7:00 am-11:06 am

1 stop7h 06m

Ontario

Sat 11/7

6:00 am-3:15 pm

1 stop6h 15m

$357
Quickest round-trip

NashvilleOntario

BNA Nashville Intl - ONT Ontario

BNAONT

Nashville Intl

Tue 9/15

4:50 pm-7:00 pm

Nonstop4h 10m

Ontario

Fri 9/18

11:00 am-8:20 pm

1 stop7h 20m

$363

NashvilleOntario

BNA Nashville Intl - ONT Ontario

BNAONT

Nashville Intl

Tue 9/15

4:50 pm-7:00 pm

Nonstop4h 10m

Ontario

Thu 9/17

11:00 am-8:20 pm

1 stop7h 20m

$363

KnoxvilleOntario

TYS Knoxville McGhee Tyson - ONT Ontario

TYSONT

Knoxville McGhee Tyson

Wed 9/23

5:40 am-11:09 am

1 stop8h 29m

Ontario

Mon 9/28

12:19 pm-11:55 pm

1 stop8h 36m

$363

KnoxvilleOntario

TYS Knoxville McGhee Tyson - ONT Ontario

TYSONT

Knoxville McGhee Tyson

Sat 11/7

11:59 am-8:51 pm

2 stops11h 52m

Ontario

Thu 11/26

5:00 am-4:03 pm

1 stop8h 03m

$368

KnoxvilleOntario

TYS Knoxville McGhee Tyson - ONT Ontario

TYSONT

Knoxville McGhee Tyson

Tue 10/20

10:42 am-8:31 pm

2 stops12h 49m

Ontario

Tue 10/27

5:00 am-3:00 pm

1 stop7h 00m

$368

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Fri 9/11

7:05 am-11:05 am

1 stop7h 00m

Ontario

Tue 9/15

7:05 am-5:02 pm

1 stop6h 57m

$371

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/20

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Kentucky to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Kentucky with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Kentucky to Ontario

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

Currently, March is the cheapest month in which you can book a flight from Kentucky to Ontario (average of $359). Flying from Kentucky to Ontario in November is currently the most expensive (average of $630). 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.

How much does it cost to fly round-trip from Kentucky to Ontario?

Airfare is below average for this route at the moment.
Kentucky to Ontario flights typically cost between $386 and $604 in January.
The cheapest round-trip price found within the last 5 days was $317 on Delta (Jan 5-Jan 11).

Related info for your journey

  • What airport do you fly into for flights to Ontario from Kentucky?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly into when you book flights from Kentucky to Ontario.

  • How long is the flight from Kentucky to Ontario?

    Departing from Kentucky to Ontario will take you 4h 20m. Kentucky and Ontario are separated by a distance of 1745 mi. This flight may include one or multiple stops.

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

    $148 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 Southwest and Delta, with prices starting from $157 and $160, respectively.

  • What are the most popular routes from Kentucky to Ontario?

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Kentucky 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 Kentucky to Ontario?

    Currently, March is the cheapest month in which you can book a flight from Kentucky to Ontario (average of $359). Flying from Kentucky to Ontario in November is currently the most expensive (average of $630). 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Kentucky to Ontario

Top 3 airlines flying from Kentucky to Ontario

AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$288Average$358FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$324Average$425FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$331Average$482FlexibilityNo cancel feeOn-time63%

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