Cheap flights from Louisville, KY to Ontario, CA

One search, all the flights

We find you the best flight deals and travel hacks so that you can choose how to book.

Rise above all travel anxieties

With the Kiwi.com Guarantee we have your back with whatever happens.

Trusted by millions

Join over 10 million yearly travellers booking with ease.

How much do flights to Ontario cost?

Most popular airline

Key info about flying to Ontario

Depart from
Louisville International
Arrive to
Ontario International
Average flights per week
40
Flight distance
Worth visiting
Griffith Observatory

Great deals from Louisville to Ontario

Not happy with the results? Try some of our useful filters

Check-in for a flight from Louisville to Ontario

NameCarrier codeIATA CodePassport needed during booking
United AirlinesUALUAYes

Weather in Ontario

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January18°C7°C
February18°C7°C
March20°C8°C
April23°C10°C
May25°C12°C
June29°C16°C
July33°C19°C
August33°C20°C
September32°C18°C
October27°C15°C
November22°C10°C
December17°C7°C
Hottest Month
33°C
August
Coldest month
7°C
February
Sunny days
340
days per year

14 day forecast

Friday
13 Dec
17°C9°C
20 Dec
22°C12°C
Saturday
14 Dec
18°C9°C
21 Dec
22°C12°C
Sunday
15 Dec
20°C7°C
22 Dec
22°C13°C
Monday
16 Dec
23°C9°C
23 Dec
21°C12°C
Tuesday
17 Dec
21°C10°C
24 Dec
17°C10°C
Wednesday
18 Dec
21°C12°C
25 Dec
19°C9°C
Thursday
19 Dec
22°C12°C
26 Dec
21°C11°C
The most popular airline for this route is United Airlines. Louisville and Ontario have 40 direct flights per week.

Frequently asked questions

What are the most popular routes to and from Louisville?
What are the most popular routes to and from Ontario?
What airports are near Louisville?
What airports are near Ontario?
Which airlines fly between Louisville and Ontario?
When's the best time to travel between Louisville and Ontario?
What flights operate between Louisville and Ontario?
How many airports are there near Louisville?
How many airports are there near Ontario?
What time do nonstop (direct) flights between Louisville and Ontario depart?
What time do nonstop (direct) flights between Louisville and Ontario arrive?
What time do flights between Louisville and Ontario depart?
What time do flights between Louisville and Ontario arrive?

Explore alternative trips

Flights from Louisville

Flights to Ontario

Popular routes

The nearest countries with flights to Ontario

Here is a list of countries people are flying from

Other destination countries from Louisville

Here is a list of countries people are flying to
Find the best connection from Louisville to Ontario
Search flights

Get more out of Kiwi.com with our mobile application

Download boarding passes

One-click booking

Get exclusive offers and prices

Mobile trip notifications

We hack the system,
you fly for less