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$139+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ONT
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
1 adult, Economy
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Cheapflights Tip: The best prices from Raleigh-Durham to Ontario are usually found in March or November, booked 23 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 March 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$278
(Frontier)

One-way from

$139
(Frontier)

Popular in

December

Cheapest in

March

Average price

$350
Provider with most accurate pricing for Raleigh-Durham-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Raleigh-Durham-Ontario flights.
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From Raleigh-Durham to Ontario
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One-way flight from Raleigh-Durham to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($26 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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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 March 25, 2025.

This Frontier deal was found by Cheapflights users on 3/24. 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 4/107:44 pmRDU - ONT
1 stop7h 15mFrontier
Tue 4/1512:59 amONT - RDU
1 stop12h 35mFrontier
Deal found 3/24$278
This Kiwi.com deal was found by Cheapflights users on 3/24. 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 5/87:20 amRDU - ONT
1 stop11h 12mHawaiian Airlines
Thu 5/154:45 pmONT - RDU
1 stop9h 56mHawaiian Airlines
Deal found 3/24$334
This Alaska Airlines deal was found by Cheapflights users on 3/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/86:05 pmRDU - ONT
1 stop19h 46mAlaska Airlines
Thu 5/156:00 amONT - RDU
1 stop20h 41mAlaska Airlines
Deal found 3/24$342
This Delta deal was found by Cheapflights users on 3/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/165:20 amRDU - ONT
1 stop8h 37mDelta
Wed 4/1610:15 pmONT - RDU
1 stop7h 39mDelta
Deal found 3/24$343
This American Airlines deal was found by Cheapflights users on 3/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/37:33 amRDU - ONT
1 stop7h 26mAmerican Airlines
Sat 5/1010:51 amONT - RDU
1 stop6h 42mAmerican Airlines
Deal found 3/24$345
This United Airlines deal was found by Cheapflights users on 3/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/165:00 pmRDU - ONT
1 stop7h 37mUnited Airlines
Sat 7/196:39 pmONT - RDU
2 stops11h 49mUnited Airlines
Deal found 3/24$352
This Expedia deal was found by Cheapflights users on 3/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/15:20 pmRDU - ONT
1 stop9h 39mMultiple Airlines
Tue 4/86:00 amONT - RDU
2 stops13h 14mMultiple Airlines
Deal found 3/24$381
This Southwest deal was found by Cheapflights users on 3/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/306:05 amRDU - ONT
2 stops9h 20mSouthwest
Mon 8/1110:35 amONT - RDU
1 stop8h 00mSouthwest
Deal found 3/24$387

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 March 25, 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 4/10

7:44 pm-11:59 pm

1 stop7h 15m

Ontario

Tue 4/15

12:59 am-4:34 pm

1 stop12h 35m

$278

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Thu 5/8

7:20 am-3:32 pm

1 stop11h 12m

Ontario

Thu 5/15

4:45 pm-5:41 am

1 stop9h 56m

$334

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Thu 5/8

6:05 pm-10:51 am

1 stop19h 46m

Ontario

Thu 5/15

6:00 am-5:41 am

1 stop20h 41m

$342

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Wed 4/16

5:20 am-10:57 am

1 stop8h 37m

Ontario

Wed 4/16

10:15 pm-8:54 am

1 stop7h 39m

$343

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Sat 5/3

7:33 am-11:59 am

1 stop7h 26m

Ontario

Sat 5/10

10:51 am-8:33 pm

1 stop6h 42m

$345

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Wed 7/16

5:00 pm-9:37 pm

1 stop7h 37m

Ontario

Sat 7/19

6:39 pm-9:28 am

2 stops11h 49m

$352

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Fri 4/18

6:25 am-11:05 am

1 stop7h 40m

Ontario

Mon 4/21

12:00 pm-12:10 am

1 stop9h 10m

$368

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Sat 4/5

5:20 pm-11:59 pm

1 stop9h 39m

Ontario

Mon 4/7

7:17 pm-11:05 am

2 stops12h 48m

$468

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Tue 4/1

5:20 pm-11:59 pm

1 stop9h 39m

$139

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Wed 4/23

7:20 am-3:32 pm

1 stop11h 12m

$171

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 15 results
1
2

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Raleigh-Ontario flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 March 21, 2025.

Booking 23 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 $324). 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 March 25, 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 March 25, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Raleigh to Ontario to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Alaska Airlines
8.0
Very good
9,785 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Southwest
8.0
Very good
4,272 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Delta
8.0
Very good
7,890 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Hawaiian Airlines
7.9
Good
2,330 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

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.

  • 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 $278. Additional round-trip tickets that might be worth considering are offered by Hawaiian Airlines and Alaska Airlines, with the lowest prices starting at $334 and $342, respectively. These flights start at 34% 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 $139. However, be on the lookout for offers from Alaska Airlines and Delta, 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 $324). 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

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Alternative routes for Raleigh to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Raleigh to Ontario

Discover the top 6 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 March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$148Average$256FlexibilityNo cancel feeOn-time62%
Breeze AirwaysCheapest$204Average$300FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$275Average$505FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$304Average$457FlexibilityNo cancel feeOn-time71%
DeltaCheapest$312Average$467FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$326Average$452FlexibilityNo cancel feeOn-time63%
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