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$81+ 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ONT
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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1. Tell us where you want to go

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

Cheap 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 December 18, 2025.

This Frontier deal was found by Cheapflights users on 12/15. 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.
Wed 12/247:36 pmRDU - ONT
1 stop7h 23mFrontier
Mon 1/56:45 amONT - RDU
1 stop8h 56mFrontier
Deal found 12/15$383
This Frontier deal was found by Cheapflights users on 12/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:36 pmRDU - ONT
1 stop7h 23mFrontier
Mon 1/56:45 amONT - RDU
1 stop8h 56mFrontier
Deal found 12/16$413
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
Tue 12/305:50 pmRDU - ONT
2 stops54h 27mMultiple Airlines
Sun 1/116:00 amONT - RDU
1 stop9h 41mMultiple Airlines
Deal found 12/17$422
This CheapOair deal was found by Cheapflights users on 12/16. 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.
Tue 12/308:51 pmRDU - ONT
1 stop23h 39mFrontier
Mon 1/56:45 amONT - RDU
1 stop8h 56mFrontier
Deal found 12/16$434
This Frontier deal was found by Cheapflights users on 12/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:36 pmRDU - ONT
1 stop7h 23mFrontier
Sat 12/276:45 amONT - RDU
1 stop6h 38mFrontier
Deal found 12/16$442
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
Mon 12/2910:26 amRDU - ONT
2 stops37h 51mMultiple Airlines
Sun 1/116:00 amONT - RDU
1 stop9h 41mMultiple Airlines
Deal found 12/17$443
This Frontier deal was found by Cheapflights users on 12/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/237:36 pmRDU - ONT
1 stop7h 23mFrontier
Fri 1/236:20 amONT - RDU
1 stop9h 24mFrontier
Deal found 12/16$447
This Trip.com deal was found by Cheapflights users on 12/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:36 pmRDU - ONT
1 stop7h 23mFrontier
Mon 12/296:20 pmONT - RDU
1 stop22h 36mFrontier
Deal found 12/16$469
This Frontier deal was found by Cheapflights users on 12/15. 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.
Wed 12/247:36 pmRDU - ONT
1 stop7h 23mFrontier
Sun 1/46:45 amONT - RDU
1 stop8h 56mFrontier
Deal found 12/15$472
This CheapOair deal was found by Cheapflights users on 12/17. 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 12/267:36 pmRDU - ONT
1 stop7h 23mFrontier
Sat 12/276:45 amONT - RDU
1 stop6h 38mFrontier
Deal found 12/17$473
This Frontier deal was found by Cheapflights users on 12/15. 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.
Sun 12/217:36 pmRDU - ONT
1 stop7h 23mFrontier
Mon 1/56:45 amONT - RDU
1 stop8h 56mFrontier
Deal found 12/15$483
This Frontier deal was found by Cheapflights users on 12/15. 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.
Wed 12/247:36 pmRDU - ONT
1 stop7h 23mFrontier
Fri 1/26:45 amONT - RDU
1 stop8h 56mFrontier
Deal found 12/15$492

Find 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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$166
(CheapOair)

One-way from

$81
(CheapOair)

Popular in

February

Cheapest in

October

Average price

$486
Provider with most accurate pricing for Raleigh-Durham-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Raleigh-Durham-Ontario flights.
Search Deals
From Raleigh-Durham to Ontario
Search Deals
One-way flight from Raleigh-Durham to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 18, 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

Mon 2/23

5:11 pm-11:59 pm

1 stop9h 48m

Ontario

Thu 2/26

6:05 am-4:00 pm

1 stop6h 55m

$182

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Mon 1/12

7:36 pm-11:56 pm

1 stop7h 20m

Ontario

Thu 1/15

6:10 am-6:44 pm

1 stop9h 34m

$182

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Sun 1/11

7:36 pm-11:56 pm

1 stop7h 20m

Ontario

Thu 1/15

6:10 am-6:44 pm

1 stop9h 34m

$217

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Fri 2/20

11:13 am-8:48 pm

1 stop12h 35m

Ontario

Wed 2/25

7:30 am-4:00 pm

1 stop29h 30m

$218

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Fri 1/9

5:10 am-10:08 am

1 stop7h 58m

Ontario

Tue 1/13

12:57 pm-11:34 pm

1 stop7h 37m

$237

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Tue 1/20

4:44 pm-9:59 pm

1 stop8h 15m

Ontario

Fri 1/23

5:05 am-3:05 pm

1 stop7h 00m

$237

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Fri 1/9

8:03 am-5:43 pm

2 stops12h 40m

Ontario

Tue 1/13

5:05 am-3:05 pm

1 stop7h 00m

$242

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Wed 1/14

7:36 am-1:56 pm

1 stop9h 20m

Ontario

Thu 1/22

10:30 pm-8:52 am

1 stop7h 22m

$267

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Sat 1/24

7:15 am-1:56 pm

1 stop9h 41m

Ontario

Sat 1/31

10:30 pm-8:52 am

1 stop7h 22m

$267

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Sat 1/24

7:15 am-1:56 pm

1 stop9h 41m

Ontario

Fri 1/30

10:30 pm-8:54 am

1 stop7h 24m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 21 results
1
2
3

Compare providers for flights from Raleigh to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Raleigh to Ontario in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*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 Raleigh-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Raleigh-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Raleigh-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Raleigh-Ontario flights, Cheapflights users trust eDreams the most. eDreams 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 Raleigh-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 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 December 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, January is the cheapest month in which you can book a flight from Raleigh to Ontario (average of $129). Flying from Raleigh to Ontario in December is currently the most expensive (average of $260). 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 December 18, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 28% 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. Sunday at noon 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 December 18, 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
7.9
Good
4,250 reviews

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

7.9

Entertainment

7.5

Food

7.0

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
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

7.9

Entertainment

7.5

Food

7.0

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
7.9
Good
8,005 reviews
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

7.9

Entertainment

7.5

Food

7.0

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
9,091 reviews
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

7.9

Entertainment

7.5

Food

7.0

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
11,054 reviews
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

7.9

Entertainment

7.5

Food

7.0

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
3,081 reviews
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

7.9

Entertainment

7.5

Food

7.0

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 American Airlines fly from Raleigh to Ontario in about 7h 58m. The time it takes to get you to your destination can typically vary by up to 1h 50m. 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 $159. Additional round-trip tickets that might be worth considering are offered by American Airlines and United Airlines, with the lowest prices starting at $266 and $286, respectively. These flights start at 60% 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 $85. However, be on the lookout for offers from American Airlines 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, January is the cheapest month in which you can book a flight from Raleigh to Ontario (average of $129). Flying from Raleigh to Ontario in December is currently the most expensive (average of $260). 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.

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Alternative routes for Raleigh to Ontario

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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$159Average$277FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$266Average$434FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$286Average$444FlexibilityNo cancel feeOn-time69%
DeltaCheapest$296Average$408FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$327Average$475FlexibilityNo cancel feeOn-time63%

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