HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$83+ Cheap flights from Raleigh to Ontario (RDU - 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 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ONT
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Raleigh 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.

Cheapflights Tip: The best prices from Raleigh-Durham to Ontario are usually found in March or July, booked 29 days in advance, depart on a Monday or Wednesday and return on a Wednesday

Cheap flight deals from Raleigh to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Raleigh (RDU) 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 September 17, 2025.

Round-trip from

$158
(CheapOair)

One-way from

$83
(Trip.com)

Popular in

December

Cheapest in

March

Average price

$434
From Raleigh-Durham to Ontario
Search Deals
One-way flight from Raleigh-Durham to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($56 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Raleigh to Ontario

Cheapest flights from Raleigh to Ontario
Explore the most affordable flight options available from Raleigh to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This CheapOair deal was found by Cheapflights users on 9/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/65:51 pmRDU - ONT
1 stop27h 58mFrontier
Sun 11/91:46 pmONT - RDU
1 stop28h 25mFrontier
Deal found 9/15$158
This CheapOair deal was found by Cheapflights users on 9/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:06 pmRDU - ONT
1 stop27h 29mFrontier
Sun 10/57:15 pmONT - RDU
1 stop11h 48mFrontier
Deal found 9/16$159
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:39 pmRDU - ONT
1 stop9h 11mFrontier
Sat 10/257:04 amONT - RDU
1 stop7h 00mFrontier
Deal found 9/15$170
This CheapOair deal was found by Cheapflights users on 9/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/117:51 pmRDU - ONT
1 stop24h 58mFrontier
Sat 10/188:34 amONT - RDU
1 stop22h 48mFrontier
Deal found 9/15$179
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2311:07 amRDU - ONT
1 stop7h 25mFrontier
Sun 10/266:53 amONT - RDU
1 stop6h 51mFrontier
Deal found 9/16$183
This CheapOair deal was found by Cheapflights users on 9/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/265:23 pmRDU - ONT
1 stop29h 31mFrontier
Sun 9/287:15 pmONT - RDU
1 stop11h 48mFrontier
Deal found 9/15$184
This CheapOair deal was found by Cheapflights users on 9/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/245:39 pmRDU - ONT
1 stop9h 11mFrontier
Sun 10/2612:49 pmONT - RDU
1 stop21h 43mFrontier
Deal found 9/15$189
This CheapOair deal was found by Cheapflights users on 9/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2810:53 amRDU - ONT
1 stop7h 31mFrontier
Sun 10/57:15 pmONT - RDU
1 stop11h 48mFrontier
Deal found 9/14$190
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/65:21 pmRDU - ONT
1 stop9h 29mFrontier
Sun 11/167:22 amONT - RDU
1 stop13h 33mFrontier
Deal found 9/15$200
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:39 pmRDU - ONT
1 stop9h 11mFrontier
Wed 10/296:53 amONT - RDU
2 stops28h 06mFrontier
Deal found 9/15$207

Cheapflights Fare Finder

 
Customize your flight search to find flights from Raleigh 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 September 17, 2025.
Use the filters below to find and compare flights from Raleigh to Ontario that are best for you.

Fly from

Raleigh

Fly to

Ontario

Route

Depart

Return

Price

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Thu 10/16

6:42 pm-4:28 pm

1 stop24h 46m

Ontario

Sun 10/19

12:49 pm-1:32 pm

1 stop21h 43m

$211

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Mon 9/29

5:23 pm-7:54 pm

1 stop29h 31m

Ontario

Wed 10/1

8:59 pm-4:38 pm

1 stop16h 39m

$284

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Wed 10/22

3:42 pm-10:22 pm

1 stop9h 40m

Ontario

Sat 10/25

11:36 am-8:56 pm

1 stop6h 20m

$297

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Tue 12/9

12:43 pm-7:35 pm

1 stop9h 52m

Ontario

Mon 12/15

10:25 pm-8:53 am

1 stop7h 28m

$297

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Wed 11/12

6:15 am-10:40 am

1 stop7h 25m

Ontario

Sat 11/15

6:00 am-4:25 pm

1 stop7h 25m

$297

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Tue 11/11

5:15 am-10:40 am

1 stop8h 25m

Ontario

Sun 11/16

10:25 pm-8:51 am

1 stop7h 26m

$297

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Wed 12/10

6:15 am-10:40 am

1 stop7h 25m

Ontario

Mon 12/15

6:00 am-5:31 pm

1 stop8h 31m

$297

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Wed 11/12

5:41 pm-11:04 pm

1 stop8h 23m

Ontario

Sun 11/16

10:25 pm-8:51 am

1 stop7h 26m

$297

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Fri 11/14

12:20 pm-5:15 pm

1 stop7h 55m

Ontario

Sat 11/22

3:40 pm-12:40 am

1 stop6h 00m

$322

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Wed 12/10

1:30 pm-10:49 pm

2 stops12h 19m

Ontario

Tue 1/6

7:00 am-5:04 pm

1 stop7h 04m

$322

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 23 results
1
2
3

Best time to book a flight from Raleigh to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Raleigh 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.

Cheapflights Insights

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

How far ahead should I book a flight from Raleigh to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Raleigh to Ontario. Price data was last updated on September 12, 2025.

Booking 29 days in advance of your planned departure date is, on average, the best time to get cheap flights from Raleigh to Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from Raleigh to Ontario (average of $246). Flying from Raleigh to Ontario in March is currently the most expensive (average of $327). 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 RDU to ONT?

Find hourly flight availability from Raleigh 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 September 17, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 29% on flights from Raleigh to Ontario by exploring options for tickets in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Raleigh to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Raleigh to Ontario flight should consider departing on Tuesday evenings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 September 17, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Raleigh to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,961 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,926 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,173 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Raleigh to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Raleigh to Ontario?

    Airlines like Frontier and Delta fly from Raleigh to Ontario in about 9h 40m. The time it takes to get you to your destination can typically vary by up to 15h 06m. The distance between Raleigh and Ontario is about 2185 mi. This flight may include one or multiple stops.

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

    Flying on Frontier is currently your cheapest option to Ontario, with prices starting at $148. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at $304 and $321, respectively. These flights start at 64% lower than the current average price 3 months from now.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $92. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from Raleigh to Ontario for a low price.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Raleigh to Ontario (average of $246). Flying from Raleigh to Ontario in March is currently the most expensive (average of $327). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Raleigh to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Raleigh to Las Vegas flights
Charlotte to Las Vegas flights
Raleigh to Los Angeles flights
Raleigh to San Francisco flights
Charlotte to Los Angeles flights
Charlotte to San Francisco flights
Charlotte to San Diego flights
Greensboro to Las Vegas flights
Norfolk to Las Vegas flights
Charlotte to Ontario flights
Knoxville to Las Vegas flights
Raleigh to Santa Ana flights
Norfolk to Los Angeles flights
Raleigh to San Diego flights
Charlotte to Santa Ana flights
Charlotte to Burbank flights
Charlotte to Sacramento flights
Myrtle Beach to Las Vegas flights
Greensboro to Los Angeles flights
Knoxville to Los Angeles flights
Raleigh to San Jose flights
Norfolk to San Francisco flights
Raleigh to Sacramento flights
Asheville to San Diego flights
Raleigh to Burbank flights
Greensboro to San Diego flights
Charlotte to Fresno flights
Knoxville to Ontario flights
Norfolk to Ontario flights
Knoxville to Sacramento flights
Wilmington to Las Vegas flights
Raleigh to Reno flights
Blountville to Los Angeles flights
Knoxville to San Diego flights
Charlotte to San Jose flights
Raleigh to Palm Springs flights
Charlotte to Palm Springs flights
Blountville to Las Vegas flights
Asheville to San Francisco flights
Greensboro to Ontario flights
Greensboro to Santa Ana flights
Asheville to Los Angeles flights
Asheville to Las Vegas flights
Greensboro to San Jose flights
Wilmington to San Diego flights
Knoxville to San Luis Obispo flights
Norfolk to San Diego flights
Asheville to Sacramento flights
Knoxville to San Jose flights

Top 5 airlines flying from Raleigh to Ontario

Discover the top 5 airlines that operate flights from Raleigh 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$148Average$276FlexibilityNo cancel feeOn-time62%
DeltaCheapest$304Average$416FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$321Average$440FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$322Average$458FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$329Average$452FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.