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Cheap Flights from Cincinnati (CVG) to Ontario (ONT)

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Compare Cincinnati Northern Kentucky to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from Cincinnati Northern Kentucky to Ontario International

Looking for a cheap last-minute deal or the best return flight from Cincinnati Northern Kentucky to Ontario International? Find the lowest prices on one-way and return tickets right here.
Ontario.$360 per passenger.Departing Tue, 26 Aug, returning Fri, 29 Aug.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Cincinnati Northern Kentucky on Tue, 26 Aug, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Fri, 29 Aug, arriving in Cincinnati Northern Kentucky.Price includes taxes and charges.From $360, select.
Ontario.$391 per passenger.Departing Sat, 4 Oct, returning Mon, 6 Oct.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Cincinnati Northern Kentucky on Sat, 4 Oct, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Mon, 6 Oct, arriving in Cincinnati Northern Kentucky.Price includes taxes and charges.From $391, select.
Ontario.$455 per passenger.Departing Tue, 1 Jul, returning Sat, 5 Jul.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Cincinnati Northern Kentucky on Tue, 1 Jul, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 5 Jul, arriving in Cincinnati Northern Kentucky.Price includes taxes and charges.From $455, select.
Ontario.$512 per passenger.Departing Thu, 6 Nov, returning Sun, 9 Nov.Return flight with United.Outbound indirect flight with United, departs from Cincinnati Northern Kentucky on Thu, 6 Nov, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Sun, 9 Nov, arriving in Cincinnati Northern Kentucky.Price includes taxes and charges.From $512, select.
Ontario.$525 per passenger.Departing Mon, 22 Sep, returning Sat, 27 Sep.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Cincinnati Northern Kentucky on Mon, 22 Sep, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 27 Sep, arriving in Cincinnati Northern Kentucky.Price includes taxes and charges.From $525, select.
Ontario.$526 per passenger.Departing Wed, 24 Sep, returning Mon, 6 Oct.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Cincinnati Northern Kentucky on Wed, 24 Sep, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Mon, 6 Oct, arriving in Cincinnati Northern Kentucky.Price includes taxes and charges.From $526, select.
Ontario.$545 per passenger.Departing Fri, 13 Jun, returning Fri, 27 Jun.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Cincinnati Northern Kentucky on Fri, 13 Jun, arriving in Ontario International.Inbound indirect flight with Frontier Airlines, departs from Ontario International on Fri, 27 Jun, arriving in Cincinnati Northern Kentucky.Price includes taxes and charges.From $545, select.
Ontario.$587 per passenger.Departing Wed, 30 Jul, returning Mon, 4 Aug.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Cincinnati Northern Kentucky on Wed, 30 Jul, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Mon, 4 Aug, arriving in Cincinnati Northern Kentucky.Price includes taxes and charges.From $587, select.

The cheapest month to fly from Cincinnati Northern Kentucky Airport to Ontario International Airport

We’re always keeping an eye on fares, to help you find the lowest one in seconds. Check out the Cincinnati Northern Kentucky Airport to Ontario International Airport flight prices forecast over the next 12 months.
Jun
from $545
Jul
from $455
Aug
from $360
Sep
from $525
Oct
from $391
Nov
from $512
Dec
from $740
Jan
from $686
Feb
Find prices
Mar
Find prices
Apr
Find prices
May
Find prices
Cheapest month:August
Most expensive month:December

Cincinnati Northern Kentucky to Ontario International: Alternative routes

Compare routes from Cincinnati Northern Kentucky to Ontario below. You may find an airport to fly into that's cheaper, faster, or easier than Ontario International.

Cincinnati to Ontario: Flight information

The things to know before you go.
Cheapest flight found$360
Cheapest month to flyAugust

Finding cheap flights from Cincinnati Northern Kentucky to Ontario International: Frequently asked questions

The best price we found for a return flight from Cincinnati Northern Kentucky to Ontario International is $360. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Cincinnati Northern Kentucky to Ontario International. But we found flights with one or more stops from $360.
As of June 2025, there are no flights flying from Cincinnati Northern Kentucky to Ontario International.
The cheapest month to fly from Cincinnati Northern Kentucky to Ontario International is usually June 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Cincinnati Northern Kentucky Airport to Ontario International Airport on Tuesday, 26 August 2025.
No airlines currently offer direct flights between Cincinnati Northern Kentucky Airport and Ontario International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ontario International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Ontario is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Southwest Airlines offers the cheapest flight tickets to Ontario International.

Travelling from Cincinnati/Northern Kentucky Airport (CVG) to Ontario International Airport (ONT): what you need to know

  • Ontario's timezone is UTC-7, which makes Ontario three hours behind Cincinnati.

  • Arrive at the airport on time so you don't miss your CVG to ONT flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid sprinting to your gate.

  • You'll likely experience bigger queues in popular months like July. Arriving up to four hours in advance for an international flight and two hours for a domestic departure is a smart move.

  • We make it a piece of cake to book a flight with a stopover. To see your options for tickets from Cincinnati/Northern Kentucky Airport to Ontario International Airport, deselect 'Direct flights only.' Then, pick a flight offering a stop long enough to explore the city of your choice. Worthwhile stopovers between CVG and ONT include:

    • Phoenix Sky Harbour International Airport

    • Harry Reid Airport (formerly McCarran Airport)

    • Denver International Airport

How to find the cheapest flights from Cincinnati/Northern Kentucky Airport (CVG) to Ontario International Airport (ONT)

  • Right now, $183 is the lowest price we've seen for a one-way Cincinnati/Northern Kentucky Airport to Ontario International Airport flight. The best price for a return ticket is $360. Keep in mind that fares can change due to availability at the time of booking.

  • Don't wait until the last minute. You're more likely to get cheap tickets from CVG to ONT if you book early. Airlines often offer some fantastic early bird rates.

  • The 'Whole month' search tool shows you the cheapest flights from Cincinnati/Northern Kentucky Airport to Ontario International Airport across the entire month. It's an easy way to snap up a bargain if your plans aren't set in stone.

  • You don't need to check every day to see if fares have gone down when you create a Price Alert. We'll let you know the moment there's a better deal on cheap flights from CVG to ONT.

  • Choose your preferred arrival and departure times, number of stops and airlines with the filters. Or sort your results by 'Cheapest' to see the best deals on flights from Cincinnati/Northern Kentucky Airport to Ontario International Airport.

Handy information about Cincinnati/Northern Kentucky Airport (CVG)

  • When it comes to Cincinnati/Northern Kentucky Airport's on-time performance, 77.0% of flights complete their journey on time.

  • Cincinnati/Northern Kentucky Airport is about 21 kilometres from central Cincinnati. If you're ride-sharing, catching a cab or driving from the centre, it'll take 20 minutes or so to arrive, depending on the traffic.

  • You can expect a trip time of around 40 minutes on public transport.

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • ONT is located at 2900 E. Airport Drive.

  • From Ontario International Airport, Ontario is approximately 6 kilometres away. It takes around 10 minutes to reach the centre by car.

  • Travelling on public transport typically takes 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

  • The quietest month for a flight from Cincinnati/Northern Kentucky Airport to Ontario International Airport is May, while August is the busiest. Pick the best time to visit Ontario based on whether you prefer a faster pace or a more relaxed vibe.

  • Lock in your flight from Cincinnati/Northern Kentucky Airport to Ontario International Airport for August if you want to visit Ontario during its warmest month. You can expect temperatures of between 15ºC (59ºF) and 35ºC (95ºF).

  • January has average temperatures of between 4ºC (39ºF) and 23ºC (73ºF). Search for cheap tickets from CVG to ONT around that time if you like cooler conditions.

Explore more of United States

  • Ontario has loads to offer, but there are so many other corners of United States waiting to be explored. Around 56 kilometres west of Ontario, a visit to Los Angeles will keep your itinerary packed. Don't miss top attractions like Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • San Diego is another sought-after destination in United States and is around 153 kilometres south of Ontario. No journey is complete without seeing San Diego Zoo, USS Midway Museum and SeaWorld San Diego.

Plan the rest of your trip from Cincinnati to Ontario

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.