Find Cheap Flights from Washington to Ontario (WAS - ONT)

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Fri 11/24
Fri 12/1
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Good to Know

Average Price:
$422
(avg. price over the last 2 weeks)
Good Deal:
$316
or less (round trip)

When to Book Flights from Washington to Ontario

Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $316 or less.
The cheapest flight from Washington to Ontario was found 72 days before departure, on average.
Book at least 1 week before departure in order to get a below-average price.
Morning departure is around 36% more expensive 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 Washington to Ontario Flights

How long does a flight from Washington to Ontario take?
An average nonstop flight takes 7h 40m, covering a distance of 2261 miles.
Which airlines provide the cheapest flights from Washington to Ontario?
In the past 3 days, the cheapest round-trip tickets were found on Frontier ($202) and Multiple Airlines ($259)
Do I need a passport to fly between Washington and Ontario?
No.
What’s the cheapest day of the week to fly Washington to Ontario?
For Washington to Ontario, Friday is the cheapest day to fly on average and Monday is the most expensive. Flying from Ontario back to Washington, the best deals are generally found on Saturday, with Tuesday being the most expensive.

Book cheap flights from Washington to Ontario (round-trip)

Airports
Origin
Washington
$229
only
$229
$202
only
$202
Destination
Ontario
$202
only
$202
Fri, Dec 1
DCA
ONT
19h 10m
Sun, Dec 3
ONT
DCA
23h 50m
Trip: 3 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
PHX
CVG
Good 7.0

I liked that the staff was friendly and the tickets were affordable

I didn’t like that there was no complimentary food or beverage options.

MCO
ATL
Okay 5.3

The poor way they handle things when the system goes down

PVD
MCO
Mediocre 2.0

Seats are hard and uncomfortable. Very small drink tray and lights are not adjustable.

MSP
DEN
Mediocre 2.0

We didn't make it to Vegas and they barely compensated us.

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, Dec 8
DCA
ONT
19h 10m
Mon, Dec 18
ONT
DCA
8h 25m
Trip: 11 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Dec 12
DCA
ONT
14h 15m
Sun, Dec 17
ONT
DCA
14h 25m
Trip: 6 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
TPA
MKE
Good 6.3

The toilet was broken. Hour delay

AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

MKE
LAS
Okay 5.6

The crew was most friendly and accommodating. Pilots very informative made a could be turbulent flight very smooth.

Seats are very uncomfortable had a bar straight across bottom of my back. Lack of food and beverages. The plane should always be stocked.

PVD
MCO
Mediocre 2.0

Seats are hard and uncomfortable. Very small drink tray and lights are not adjustable.

MCO
ATL
Okay 5.3

The poor way they handle things when the system goes down

Tue, Jan 16
DCA
ONT
8h 11m
Wed, Jan 17
ONT
DCA
8h 47m
Trip: 2 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MCO
DEN
Good 6.0

It was cheap

MSY
DEN
Excellent 8.0

Flight was delayed

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

MKE
LAS
Okay 5.6

The crew was most friendly and accommodating. Pilots very informative made a could be turbulent flight very smooth.

Seats are very uncomfortable had a bar straight across bottom of my back. Lack of food and beverages. The plane should always be stocked.

DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

Tue, Feb 6
DCA
ONT
23h 12m
Sat, Feb 10
ONT
DCA
8h 47m
Trip: 5 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
PVD
MCO
Mediocre 2.0

Seats are hard and uncomfortable. Very small drink tray and lights are not adjustable.

TPA
MKE
Good 6.3

The toilet was broken. Hour delay

DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

PHX
CVG
Good 7.0

I liked that the staff was friendly and the tickets were affordable

I didn’t like that there was no complimentary food or beverage options.

Sat, Dec 9
IAD
ONT
7h 55m
Wed, Dec 13
ONT
IAD
7h 47m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Jan 20
DCA
ONT
10h 58m
Sat, Jan 27
ONT
DCA
8h 47m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Fri, Dec 1
IAD
ONT
7h 55m
Sat, Dec 2
ONT
IAD
6h 40m
Trip: 2 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

MSY
DEN
Excellent 8.0

Flight was delayed

PVD
MCO
Mediocre 2.0

Seats are hard and uncomfortable. Very small drink tray and lights are not adjustable.

MKE
LAS
Okay 5.6

The crew was most friendly and accommodating. Pilots very informative made a could be turbulent flight very smooth.

Seats are very uncomfortable had a bar straight across bottom of my back. Lack of food and beverages. The plane should always be stocked.

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

Sat, Jan 6
IAD
ONT
8h 11m
Fri, Jan 12
ONT
IAD
6h 50m
Trip: 7 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
TPA
MKE
Good 6.3

The toilet was broken. Hour delay

MSP
DEN
Mediocre 2.0

We didn't make it to Vegas and they barely compensated us.

MSY
DEN
Excellent 8.0

Flight was delayed

MCO
ATL
Okay 5.3

The poor way they handle things when the system goes down

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

Tue, Jan 9
IAD
ONT
8h 05m
Wed, Jan 17
ONT
IAD
6h 50m
Trip: 9 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 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

PHL
PBI
Good 6.3

The plane was clean and we left on time with no delays or issues. The flight crew were very nice and there was also enough overhead space for everyone’s bags.

The lines are excessively long to check a bag, there was only 1 of 4 check in kiosks working, which created it’s own line. Also the carry on bag fee at the airport was incredibly steep.

MCO
DEN
Good 6.0

It was cheap

MKE
LAS
Okay 5.6

The crew was most friendly and accommodating. Pilots very informative made a could be turbulent flight very smooth.

Seats are very uncomfortable had a bar straight across bottom of my back. Lack of food and beverages. The plane should always be stocked.

PVD
MCO
Mediocre 2.0

Seats are hard and uncomfortable. Very small drink tray and lights are not adjustable.

Thu, Feb 1
IAD
ONT
8h 05m
Wed, Feb 7
ONT
IAD
6h 50m
Trip: 7 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MKE
LAS
Okay 5.6

The crew was most friendly and accommodating. Pilots very informative made a could be turbulent flight very smooth.

Seats are very uncomfortable had a bar straight across bottom of my back. Lack of food and beverages. The plane should always be stocked.

AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

TPA
MKE
Good 6.3

The toilet was broken. Hour delay

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

Tue, Feb 6
IAD
ONT
8h 05m
Fri, Feb 9
ONT
IAD
6h 50m
Trip: 4 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MSY
DEN
Excellent 8.0

Flight was delayed

PHL
PBI
Good 6.3

The plane was clean and we left on time with no delays or issues. The flight crew were very nice and there was also enough overhead space for everyone’s bags.

The lines are excessively long to check a bag, there was only 1 of 4 check in kiosks working, which created it’s own line. Also the carry on bag fee at the airport was incredibly steep.

MKE
LAS
Okay 5.6

The crew was most friendly and accommodating. Pilots very informative made a could be turbulent flight very smooth.

Seats are very uncomfortable had a bar straight across bottom of my back. Lack of food and beverages. The plane should always be stocked.

MCO
ATL
Okay 5.3

The poor way they handle things when the system goes down

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

Mon, Mar 5
IAD
ONT
7h 40m
Tue, Mar 13
ONT
IAD
6h 52m
Trip: 8 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

MSP
DEN
Mediocre 2.0

We didn't make it to Vegas and they barely compensated us.

MSY
DEN
Excellent 8.0

Flight was delayed

TPA
MKE
Good 6.3

The toilet was broken. Hour delay

AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

Wed, Apr 4
IAD
ONT
7h 40m
Sat, Apr 7
ONT
IAD
6h 50m
Trip: 4 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
PVD
MCO
Mediocre 2.0

Seats are hard and uncomfortable. Very small drink tray and lights are not adjustable.

PHX
CVG
Good 7.0

I liked that the staff was friendly and the tickets were affordable

I didn’t like that there was no complimentary food or beverage options.

PHL
PBI
Good 6.3

The plane was clean and we left on time with no delays or issues. The flight crew were very nice and there was also enough overhead space for everyone’s bags.

The lines are excessively long to check a bag, there was only 1 of 4 check in kiosks working, which created it’s own line. Also the carry on bag fee at the airport was incredibly steep.

MSY
DEN
Excellent 8.0

Flight was delayed

MCO
DEN
Good 6.0

It was cheap

Thu, Apr 5
IAD
ONT
7h 49m
Sat, Apr 7
ONT
IAD
6h 50m
Trip: 3 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

PHX
CVG
Good 7.0

I liked that the staff was friendly and the tickets were affordable

I didn’t like that there was no complimentary food or beverage options.

MSY
DEN
Excellent 8.0

Flight was delayed

TPA
MKE
Good 6.3

The toilet was broken. Hour delay

PHL
PBI
Good 6.3

The plane was clean and we left on time with no delays or issues. The flight crew were very nice and there was also enough overhead space for everyone’s bags.

The lines are excessively long to check a bag, there was only 1 of 4 check in kiosks working, which created it’s own line. Also the carry on bag fee at the airport was incredibly steep.

Mon, Nov 27
IAD
ONT
7h 55m
Sun, Dec 24
ONT
IAD
9h 19m
Trip: 28 days
Overall 0.0 Poor
Based on 0 reviews
Fri, May 11
IAD
ONT
15h 43m
Mon, May 14
ONT
IAD
7h 42m
Trip: 4 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

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

PHL
PBI
Good 6.3

The plane was clean and we left on time with no delays or issues. The flight crew were very nice and there was also enough overhead space for everyone’s bags.

The lines are excessively long to check a bag, there was only 1 of 4 check in kiosks working, which created it’s own line. Also the carry on bag fee at the airport was incredibly steep.

MCO
DEN
Good 6.0

It was cheap

Thu, Feb 8
IAD
ONT
8h 05m
Sat, Feb 17
ONT
IAD
6h 50m
Trip: 10 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
PVD
MCO
Mediocre 2.0

Seats are hard and uncomfortable. Very small drink tray and lights are not adjustable.

PHL
PBI
Good 6.3

The plane was clean and we left on time with no delays or issues. The flight crew were very nice and there was also enough overhead space for everyone’s bags.

The lines are excessively long to check a bag, there was only 1 of 4 check in kiosks working, which created it’s own line. Also the carry on bag fee at the airport was incredibly steep.

MCO
DEN
Good 6.0

It was cheap

AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

MKE
LAS
Okay 5.6

The crew was most friendly and accommodating. Pilots very informative made a could be turbulent flight very smooth.

Seats are very uncomfortable had a bar straight across bottom of my back. Lack of food and beverages. The plane should always be stocked.

Sat, Mar 31
IAD
ONT
7h 40m
Sat, Apr 7
ONT
IAD
6h 50m
Trip: 8 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 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

PHX
CVG
Good 7.0

I liked that the staff was friendly and the tickets were affordable

I didn’t like that there was no complimentary food or beverage options.

MCO
DEN
Good 6.0

It was cheap

MSY
DEN
Excellent 8.0

Flight was delayed

TPA
MKE
Good 6.3

The toilet was broken. Hour delay

Wed, Nov 29
IAD
ONT
7h 55m
Wed, Dec 6
ONT
IAD
6h 40m
Trip: 8 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33009 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

TPA
MKE
Good 6.3

The toilet was broken. Hour delay

MSP
DEN
Mediocre 2.0

We didn't make it to Vegas and they barely compensated us.

MCO
DEN
Good 6.0

It was cheap

MSY
DEN
Excellent 8.0

Flight was delayed

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.