Find Cheap Flights from Raleigh-Durham to Ontario (RDU - ONT)

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Wed 11/22
Wed 11/29
Any month
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Good to Know

Low Season:
October
Best time to beat the crowds
2%
expected price decrease
High Season:
December
Most popular time to fly
7%
expected price increase
Average Price:
$490
(avg. price over the last 2 weeks)
Good Deal:
$378
or less (round trip)

When to Book Flights from Raleigh-Durham to Ontario

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

When looking for a cheap flight, consider that 25% of our users selected a flight on this route for $377 or less.
The cheapest flight from Raleigh-Durham to Ontario was found 73 days before departure, on average.
Book at least 2 weeks before departure in order to get a below-average price.
Morning departure is around 5% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Raleigh-Durham to Ontario Flights

How long does a flight from Raleigh-Durham to Ontario take?
An average nonstop flight takes 7h 07m, covering a distance of 2188 miles.
Which airlines provide the cheapest flights from Raleigh-Durham to Ontario?
In the past 3 days, the cheapest round-trip tickets were found on Frontier ($238), United ($330) and Delta ($382).
Do I need a passport to fly between Raleigh-Durham and Ontario?
No.
What’s the cheapest day of the week to fly Raleigh-Durham to Ontario?
For Raleigh-Durham to Ontario, Monday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from Ontario back to Raleigh-Durham, the best deals are generally found on Wednesday, with Monday being the most expensive.

Book cheap flights from Raleigh-Durham to Ontario (round-trip)

Airports
Origin
Raleigh
$238
only
$238
Destination
Ontario
$238
only
$238
Mon, Apr 16
RDU
ONT
15h 10m
Tue, Apr 24
ONT
RDU
16h 01m
Trip: 9 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32989 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
PSP
DEN
Mediocre 3.3

My flight crew. Received call concerning my bag in Atlanta, although I was still in Denver.

Long line to check in, anxiety about missing flight Had to pay for my carry on Missed my connecting flight, announcements were not clear Was told I to pay a rebooking fee for a flight two days later Frontier does not offer stand by Spent $285 with another airline to get to Atlanta on time

DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

PHL
MCO
Good 6.3

Speedy boarding and on time departure

No complimentary snacks or drinks.

DEN
SEA
Mediocre 3.3

They still pick up trash!!

New airbus has even LESS room!! Have to manhandle your personal bag out of the even smaller space under the seat! A soda is $3! There is Nothing to read anymore and the crew are overwhelmed with cranky people... making them cranky.

SFO
ATL
Okay 5.3

The price of the flight was great, but even with an upgraded seat I will not be flying Frontier again.

I upgraded my girlfriend and I to stretch seating for our 5 hour flights roundtrip from ATL to SFO. I did not realize by upgrading and selecting my seat in row 4 that my seats do not recline. This caused several issues with my bad back and with the fold down tray on the seat in front of me. I had my laptop on the tray, and when the person in front of me leaned his seat back all the way suddenly, it pinched the top of the screen between the tray and the back of his seat and cracked my laptop exterior. The main issue was not being able to "stretch" by not having a reclining seat and experienced major discomfort and back pain both flights.

Mon, Jan 29
RDU
ONT
8h 47m
Tue, Feb 6
ONT
RDU
6h 44m
Trip: 9 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 51333 reviews
Overall
7.2
Boarding
7.3
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
EWR
PHX
Excellent 8.6

Again expectation can get in the way. And of course the airline needs for flights to be as full as possible. In order to be profitable in the long run. We all want them to be able to stay in business

Same point - the point was full and I’ve already clarified that .

SFO
PSC
Excellent 10.0

The service as soon as I walked in the first airport until I walked out the last one was excellent for this trip

MRY
LAX
Good 6.3

Boarding was organized and prompt. Crew was fantastic.

Flight was to short.

SFO
RNO
Mediocre 3.0

Flight was on time and I received my checked baggage.

Seat was uncomfortable due to insufficient foot space. All (about 6) overhead bins in the rear of the aircraft were full because crew stored “essential equipment” in them. Crew was not professional. After takeoff they never came around to see if anyone needed anything and not even a glass of water was offered for the entire flight. They didn’t even ensure that everyone wore seatbelts on landing - woman next to me was stretched out hugging her companion while landing wilth unbuckled seatbelt. Entertainment screen did not wirk properly.

SFO
ORD
Mediocre 3.6

Flight left 6 hours late with only vague explanations. Simply, "we had to get our equipment in the right places." Attempts to standby on 3 other flights were fruitless and UA airport staff gave no direction or recommendations other than "were sorry."

Thu, Dec 14
RDU
ONT
9h 46m
Mon, Dec 18
ONT
RDU
6h 42m
Trip: 5 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 13622 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
JFK
BOS
Mediocre 2.0

Haven't made it yet... still on standby in later flight

AMS
DTW
Excellent 10.0

Everything was Excellent

Excellent job and keep it up

DTW
CVG
Excellent 10.0

Everything was excellent

Excellent job and keep it up

SJO
ATL
Good 6.3

Staff lovely

Flight delayed so we got bumped to a later connecting flight An eight hour trip became a 12 hour trip

TPA
LGA
Good 7.3

Barking dogs. 4 around us! Middle seat.

Mon, May 7
RDU
ONT
14h 58m
Fri, May 11
ONT
RDU
6h 39m
Trip: 5 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32989 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
ATL
Okay 5.3

The price of the flight was great, but even with an upgraded seat I will not be flying Frontier again.

I upgraded my girlfriend and I to stretch seating for our 5 hour flights roundtrip from ATL to SFO. I did not realize by upgrading and selecting my seat in row 4 that my seats do not recline. This caused several issues with my bad back and with the fold down tray on the seat in front of me. I had my laptop on the tray, and when the person in front of me leaned his seat back all the way suddenly, it pinched the top of the screen between the tray and the back of his seat and cracked my laptop exterior. The main issue was not being able to "stretch" by not having a reclining seat and experienced major discomfort and back pain both flights.

DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

ATL
LAS
Excellent 8.5

The crew is really nice, attentive, and it's not hard to get their attention. They also don't bother you when you sleep and are overall quiet and courteous.

Not knowing how long until we land. A quick "1 hour till arrival . . . 30min..." would have been appreciated.

PHL
MCO
Good 6.3

Speedy boarding and on time departure

No complimentary snacks or drinks.

DEN
SLC
Excellent 10.0

Great flight from start to finish. Had boarding passes, so easy, Quick luggage checkin, easy boarding, and easy, Quick luggage retrieval at end of flight.

Tue, Mar 20
RDU
ONT
19h 48m
Sun, Mar 25
ONT
RDU
14h 20m
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jan 16
RDU
ONT
19h 58m
Wed, Jan 24
ONT
RDU
26h 32m
Trip: 9 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32989 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
ATL
Okay 5.3

The price of the flight was great, but even with an upgraded seat I will not be flying Frontier again.

I upgraded my girlfriend and I to stretch seating for our 5 hour flights roundtrip from ATL to SFO. I did not realize by upgrading and selecting my seat in row 4 that my seats do not recline. This caused several issues with my bad back and with the fold down tray on the seat in front of me. I had my laptop on the tray, and when the person in front of me leaned his seat back all the way suddenly, it pinched the top of the screen between the tray and the back of his seat and cracked my laptop exterior. The main issue was not being able to "stretch" by not having a reclining seat and experienced major discomfort and back pain both flights.

DEN
SEA
Mediocre 3.3

They still pick up trash!!

New airbus has even LESS room!! Have to manhandle your personal bag out of the even smaller space under the seat! A soda is $3! There is Nothing to read anymore and the crew are overwhelmed with cranky people... making them cranky.

MSY
DEN
Excellent 8.0

Flight was delayed

MCO
ATL
Okay 5.3

The poor way they handle things when the system goes down

DEN
SLC
Excellent 10.0

Great flight from start to finish. Had boarding passes, so easy, Quick luggage checkin, easy boarding, and easy, Quick luggage retrieval at end of flight.

Wed, Nov 29
RDU
ONT
7h 21m
Mon, Dec 4
ONT
RDU
6h 23m
Trip: 6 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 25306 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
BCN
JFK
Mediocre 2.0

I was booted off my flight and then got rerouted on 4 different planes...IAD to London, to Geneva to Zurich to Barcelona. Got to Barcelona and my bag was missing. It was a nightmare.

BOS
PHL
Mediocre 3.3

Delayed by nearly 2 hours, missed connecting flight

JFK
DCA
Excellent 8.0

Went smoothly

MIA
ORD
Excellent 10.0

All prompt boarding smooth flight early arrival

LHR
PHL
Excellent 9.6

I flew economy. We left the gate on time, the seat was comfortable, entertainment was varied, flight attendants that I came in contact with were professional and pleasant, food was hot and very good, pilots got me where I wanted to go, and that little container of ice cream - oh I love it! The plane was not completely full, which made the seating more comfortable than it would have been if the plane was full.

I was ushered into what became a very slow line to board. The employee at the end of my line had to deal with a few problems so I ended up boarding close to the end, behind those with higher group boarding numbers than I. Having a single line up to the two boarding employees, would avoid that, albeit make a longer line to begin with.

Sun, Feb 4
RDU
ONT
19h 58m
Mon, Feb 12
ONT
RDU
26h 32m
Trip: 9 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32989 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MCO
ATL
Okay 5.3

The poor way they handle things when the system goes down

MIA
PVD
Mediocre 2.0

Complete disaster

Never again

ATL
LAS
Excellent 8.5

The crew is really nice, attentive, and it's not hard to get their attention. They also don't bother you when you sleep and are overall quiet and courteous.

Not knowing how long until we land. A quick "1 hour till arrival . . . 30min..." would have been appreciated.

PHL
MCO
Good 6.3

Speedy boarding and on time departure

No complimentary snacks or drinks.

CVG
MCO
Okay 4.0

It got me where I needed to go, albeit with a little effort and stress. Crew was pleasant. Thank you.

6 people overbooked, who might not have gotten seats. I was one of them. I recognize there was nothing I could have done either way but it was unpleasant to hear I might not get a seat on a flight I bought a ticket to a month ago, regardless of the price. And the return flight was dismal. Had to wait an extra 3 hours for maintanence on the plane (fine, would rather it get fixed than have an issue in the air) but we were told there would be vouchers worth some amount sent to our email after we landed back in cincinnati. It's been 3 days and I have received no such vouchers. It also turns out I payed $45 for a personal bag that was I guess covered under a personal bag? I recognize this as being partly my fault, but when I went to get my ticket "personal bag" wasn't an option, so I didn't think I had one, or my single backpack actually was $45 to take with me. Was not a terrible experience. Just not a good one.

Thu, Dec 7
RDU
ONT
20h 25m
Mon, Dec 11
ONT
RDU
26h 00m
Trip: 5 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32989 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MIA
PVD
Mediocre 2.0

Complete disaster

Never again

DEN
SLC
Excellent 10.0

Great flight from start to finish. Had boarding passes, so easy, Quick luggage checkin, easy boarding, and easy, Quick luggage retrieval at end of flight.

DEN
OKC
Mediocre 2.0

Nothing

I signed up for special services for meet and assist and no one helped me.

DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

PSP
DEN
Mediocre 3.3

My flight crew. Received call concerning my bag in Atlanta, although I was still in Denver.

Long line to check in, anxiety about missing flight Had to pay for my carry on Missed my connecting flight, announcements were not clear Was told I to pay a rebooking fee for a flight two days later Frontier does not offer stand by Spent $285 with another airline to get to Atlanta on time

Sun, Feb 11
RDU
ONT
19h 58m
Wed, Feb 28
ONT
RDU
26h 38m
Trip: 18 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32989 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
ATL
LAS
Excellent 8.5

The crew is really nice, attentive, and it's not hard to get their attention. They also don't bother you when you sleep and are overall quiet and courteous.

Not knowing how long until we land. A quick "1 hour till arrival . . . 30min..." would have been appreciated.

MIA
PVD
Mediocre 2.0

Complete disaster

Never again

DEN
OKC
Mediocre 2.0

Nothing

I signed up for special services for meet and assist and no one helped me.

CVG
MCO
Okay 4.0

It got me where I needed to go, albeit with a little effort and stress. Crew was pleasant. Thank you.

6 people overbooked, who might not have gotten seats. I was one of them. I recognize there was nothing I could have done either way but it was unpleasant to hear I might not get a seat on a flight I bought a ticket to a month ago, regardless of the price. And the return flight was dismal. Had to wait an extra 3 hours for maintanence on the plane (fine, would rather it get fixed than have an issue in the air) but we were told there would be vouchers worth some amount sent to our email after we landed back in cincinnati. It's been 3 days and I have received no such vouchers. It also turns out I payed $45 for a personal bag that was I guess covered under a personal bag? I recognize this as being partly my fault, but when I went to get my ticket "personal bag" wasn't an option, so I didn't think I had one, or my single backpack actually was $45 to take with me. Was not a terrible experience. Just not a good one.

PHL
MCO
Good 6.3

Speedy boarding and on time departure

No complimentary snacks or drinks.

Wed, Apr 11
RDU
ONT
15h 10m
Sat, Apr 21
ONT
RDU
6h 29m
Trip: 11 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32989 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
SLC
Excellent 10.0

Great flight from start to finish. Had boarding passes, so easy, Quick luggage checkin, easy boarding, and easy, Quick luggage retrieval at end of flight.

SFO
ATL
Okay 5.3

The price of the flight was great, but even with an upgraded seat I will not be flying Frontier again.

I upgraded my girlfriend and I to stretch seating for our 5 hour flights roundtrip from ATL to SFO. I did not realize by upgrading and selecting my seat in row 4 that my seats do not recline. This caused several issues with my bad back and with the fold down tray on the seat in front of me. I had my laptop on the tray, and when the person in front of me leaned his seat back all the way suddenly, it pinched the top of the screen between the tray and the back of his seat and cracked my laptop exterior. The main issue was not being able to "stretch" by not having a reclining seat and experienced major discomfort and back pain both flights.

CVG
MCO
Okay 4.0

It got me where I needed to go, albeit with a little effort and stress. Crew was pleasant. Thank you.

6 people overbooked, who might not have gotten seats. I was one of them. I recognize there was nothing I could have done either way but it was unpleasant to hear I might not get a seat on a flight I bought a ticket to a month ago, regardless of the price. And the return flight was dismal. Had to wait an extra 3 hours for maintanence on the plane (fine, would rather it get fixed than have an issue in the air) but we were told there would be vouchers worth some amount sent to our email after we landed back in cincinnati. It's been 3 days and I have received no such vouchers. It also turns out I payed $45 for a personal bag that was I guess covered under a personal bag? I recognize this as being partly my fault, but when I went to get my ticket "personal bag" wasn't an option, so I didn't think I had one, or my single backpack actually was $45 to take with me. Was not a terrible experience. Just not a good one.

PHL
MCO
Good 6.3

Speedy boarding and on time departure

No complimentary snacks or drinks.

ATL
LAS
Excellent 8.5

The crew is really nice, attentive, and it's not hard to get their attention. They also don't bother you when you sleep and are overall quiet and courteous.

Not knowing how long until we land. A quick "1 hour till arrival . . . 30min..." would have been appreciated.

Thu, Nov 30
RDU
ONT
7h 20m
Wed, Dec 6
ONT
RDU
6h 23m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Mar 13
RDU
ONT
19h 48m
Wed, Mar 21
ONT
RDU
26h 35m
Trip: 9 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32989 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MCO
ATL
Okay 5.3

The poor way they handle things when the system goes down

DEN
SLC
Excellent 10.0

Great flight from start to finish. Had boarding passes, so easy, Quick luggage checkin, easy boarding, and easy, Quick luggage retrieval at end of flight.

DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

DEN
SEA
Mediocre 3.3

They still pick up trash!!

New airbus has even LESS room!! Have to manhandle your personal bag out of the even smaller space under the seat! A soda is $3! There is Nothing to read anymore and the crew are overwhelmed with cranky people... making them cranky.

PSP
DEN
Mediocre 3.3

My flight crew. Received call concerning my bag in Atlanta, although I was still in Denver.

Long line to check in, anxiety about missing flight Had to pay for my carry on Missed my connecting flight, announcements were not clear Was told I to pay a rebooking fee for a flight two days later Frontier does not offer stand by Spent $285 with another airline to get to Atlanta on time

Fri, May 18
RDU
ONT
14h 58m
Sun, Jun 10
ONT
RDU
16h 00m
Trip: 24 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32989 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
SEA
Mediocre 3.3

They still pick up trash!!

New airbus has even LESS room!! Have to manhandle your personal bag out of the even smaller space under the seat! A soda is $3! There is Nothing to read anymore and the crew are overwhelmed with cranky people... making them cranky.

PHL
MCO
Good 6.3

Speedy boarding and on time departure

No complimentary snacks or drinks.

MSY
DEN
Excellent 8.0

Flight was delayed

DEN
OKC
Mediocre 2.0

Nothing

I signed up for special services for meet and assist and no one helped me.

DEN
SLC
Excellent 10.0

Great flight from start to finish. Had boarding passes, so easy, Quick luggage checkin, easy boarding, and easy, Quick luggage retrieval at end of flight.

Tue, Dec 19
RDU
ONT
7h 07m
Tue, Dec 26
ONT
RDU
6h 29m
Trip: 8 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 51333 reviews
Overall
7.2
Boarding
7.3
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
EWR
PHX
Excellent 8.6

Again expectation can get in the way. And of course the airline needs for flights to be as full as possible. In order to be profitable in the long run. We all want them to be able to stay in business

Same point - the point was full and I’ve already clarified that .

HNL
LAX
Excellent 9.3

Fast service

Wi-Fi cost too much

MRY
LAX
Good 6.3

Boarding was organized and prompt. Crew was fantastic.

Flight was to short.

LAX
ORD
Okay 4.3

Left a little early

Smaller seats, no video or music options on a almost four hour flight. Why United why?

SFO
PSC
Excellent 10.0

The service as soon as I walked in the first airport until I walked out the last one was excellent for this trip

Sun, Dec 17
RDU
ONT
20h 31m
Sat, Dec 30
ONT
RDU
26h 10m
Trip: 14 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32989 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
PHL
MCO
Good 6.3

Speedy boarding and on time departure

No complimentary snacks or drinks.

CVG
MCO
Okay 4.0

It got me where I needed to go, albeit with a little effort and stress. Crew was pleasant. Thank you.

6 people overbooked, who might not have gotten seats. I was one of them. I recognize there was nothing I could have done either way but it was unpleasant to hear I might not get a seat on a flight I bought a ticket to a month ago, regardless of the price. And the return flight was dismal. Had to wait an extra 3 hours for maintanence on the plane (fine, would rather it get fixed than have an issue in the air) but we were told there would be vouchers worth some amount sent to our email after we landed back in cincinnati. It's been 3 days and I have received no such vouchers. It also turns out I payed $45 for a personal bag that was I guess covered under a personal bag? I recognize this as being partly my fault, but when I went to get my ticket "personal bag" wasn't an option, so I didn't think I had one, or my single backpack actually was $45 to take with me. Was not a terrible experience. Just not a good one.

DEN
SLC
Excellent 10.0

Great flight from start to finish. Had boarding passes, so easy, Quick luggage checkin, easy boarding, and easy, Quick luggage retrieval at end of flight.

SFO
ATL
Okay 5.3

The price of the flight was great, but even with an upgraded seat I will not be flying Frontier again.

I upgraded my girlfriend and I to stretch seating for our 5 hour flights roundtrip from ATL to SFO. I did not realize by upgrading and selecting my seat in row 4 that my seats do not recline. This caused several issues with my bad back and with the fold down tray on the seat in front of me. I had my laptop on the tray, and when the person in front of me leaned his seat back all the way suddenly, it pinched the top of the screen between the tray and the back of his seat and cracked my laptop exterior. The main issue was not being able to "stretch" by not having a reclining seat and experienced major discomfort and back pain both flights.

DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

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