Find Cheap Flights from Ontario to Seattle (ONT - 03A)

Search hundreds of travel sites at once for deals on flights to Seattle

Mon 1/22
Mon 1/29
Any month
Compare vs. KAYAK |

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

Airports
Origin
Ontario
$137
only
$137
Destination
Seattle
$137
only
$137
Wed, Feb 14
ONT
SEA
2h 40m
Thu, Feb 22
SEA
ONT
2h 34m
Trip: 9 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 82 reviews
Overall
8.6
Boarding
8.7
Comfort
8.4
Crew
8.9
Entertainment
7.9
Food
8.0
ONT
SEA
Excellent 10.0

Easy, and comfortable.

ONT
SEA
Excellent 10.0

Fast check-in

ONT
SEA
Excellent 9.3

The food is really good and excellent vairity

Sometimes the staff is a littls bit impatient

ONT
SEA
Excellent 8.3

Good selection of entertainment (movies).

ONT
SEA
Excellent 10.0

The flight left and arrived on time. Overall a great experience with friendly and caring people. Will definitely use them in the near future!

No issues at all

Thu, Feb 8
ONT
SEA
6h 55m
Sun, Feb 11
SEA
ONT
2h 34m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Apr 12
ONT
SEA
5h 10m
Sun, Apr 15
SEA
ONT
6h 05m
Trip: 4 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53874 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
IAD
CDG
Excellent 10.0

Got a window seat and had an amazing crew. Everything went smoothly! Dinner and breakfast served!

Everything was perfect!

SFO
LAS
Excellent 8.0

On time

EWR
IND
Good 7.0

Staff was excellent. From check in to flight crew. On time and earlier arrival. Unexpected.

Unable to bring some carryon. No coffee available on board.

MBJ
EWR
Okay 5.6

Not a whole lot, the flight and comfort were fine. The flight attendants were great.

There was NO entertainment on board unless you paid $7.99, including watching the progress of the flight from Montego Bay, Jamaica to Newark.

ORD
SAN
Okay 4.3

On time departure

No complementary food. Old plane, no great entertainment options (should also have subtitles for hard of hearing). Terminal boarding area was too cold.

Fri, Feb 23
ONT
SEA
6h 20m
Tue, Feb 27
SEA
ONT
18h 01m
Trip: 5 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 33594 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MIA
LGA
Mediocre 2.0

if you have a hard engagement that you have to make, i hate to say it, but use a bigger airline. These guys are not dependable nyc -> miami. Have had 2 flights cancelled and delayed over 6 hours in the last 6 months. Only one scheduled flight everyday. If you can risk it, fine, but otherwise not worth it.

DCA
DEN
Okay 4.0

The crew was really nice.

So many delays. My flight was eventually cancelled on Friday and was rescheduled for Saturday. The Saturday flight was delayed. All in all, i wasted a vacation day on Friday, I paid for a hotel in Denver for Friday night that I was not able to get refunded, I missed out on a day in Denver. It was a huge bummer.

SFO
ATL
Mediocre 2.0

Nothing

Everything was horrible!

DEN
SNA
Good 6.6

Basic service but smooth.

No food or drinks.

RDU
MCO
Mediocre 3.3

The dirt cheap, I can't believe an airline can operate at this low an airfare and still turn a profit-ticket prices

The hidden checked-baggage fees that were almost half the cost of the actual ticket for one bag. The non reclining seats. The lack of legroom. The feeling of cattle being herded into a slaughterhouse. The lack of friendliness with the RDU and MCO gate/ticket counter agents. The cost of having to pay $12 to ensure I sit beside my 5 year old son on the flight. Besides a free seat belt, having to pay for everything else under the sun. Surprised AC was free. Not even an in-flight magazine or barf bag. Which is exactly what I feel like doing after giving you my money......

Wed, May 2
ONT
SEA
7h 06m
Mon, May 7
SEA
ONT
5h 52m
Trip: 6 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53874 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
LAX
BJX
Excellent 10.0

On time, no issues.

TPA
ORD
Excellent 8.0

The crew were always really helpful and kind. They were happy to speak English or Japanese.

Despite stitching when I could and as soon as I could. Lower back buttocks hurt pretty bad half way through the flight. This is a knock on the airline industry and not so much ANA. Comfort levels start diminish when you try to squeeze as many seats as you can into airplane. Especially, for people like me who are at least 6' tall. Also, the food was very meh. This was surprising because all my other experiences with ANA were quite the opposite.

SFO
LAS
Excellent 8.0

On time

MBJ
EWR
Okay 5.6

Not a whole lot, the flight and comfort were fine. The flight attendants were great.

There was NO entertainment on board unless you paid $7.99, including watching the progress of the flight from Montego Bay, Jamaica to Newark.

JAX
ORD
Mediocre 3.6

The credit was polite, hat was about it

We were delayed coming out bc the plane needed de-icing... IN JACKSONVILLE, but they were unable to get manager approval for de-icing and then the truck was out of fuel. Finally, the pilot moved the plane into the sun (which should have happened much sooner). During the flight, the cabin temperature dropped to low 60s and everyone was freezing.

Fri, Jan 26
ONT
SEA
6h 20m
Mon, Mar 19
SEA
ONT
5h 25m
Trip: 52 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Jan 25
ONT
SEA
14h 45m
Sun, Jan 28
SEA
ONT
18h 01m
Trip: 4 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 33594 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SLC
ATL
Excellent 10.0

I had my own row the whole trip.

DCA
DEN
Okay 4.0

The crew was really nice.

So many delays. My flight was eventually cancelled on Friday and was rescheduled for Saturday. The Saturday flight was delayed. All in all, i wasted a vacation day on Friday, I paid for a hotel in Denver for Friday night that I was not able to get refunded, I missed out on a day in Denver. It was a huge bummer.

DEN
SNA
Good 6.6

Basic service but smooth.

No food or drinks.

MIA
LGA
Mediocre 2.0

if you have a hard engagement that you have to make, i hate to say it, but use a bigger airline. These guys are not dependable nyc -> miami. Have had 2 flights cancelled and delayed over 6 hours in the last 6 months. Only one scheduled flight everyday. If you can risk it, fine, but otherwise not worth it.

SFO
ATL
Mediocre 2.0

Nothing

Everything was horrible!

Wed, Jul 18
ONT
SEA
2h 40m
Sat, Jul 21
SEA
ONT
2h 30m
Trip: 4 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 27375 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
DTW
MIA
Excellent 9.0

The professionalism of the crew and the cleanliness was excellent!

The seats weren’t very comfortable!

DFW
ONT
Excellent 10.0

Planes were punctual and smooth flight

PHX
PDX
Excellent 10.0

The employee who checked me in was very helpful - found my frequent flyer number for another airline and give me a free checked bag.

ABQ
PHX
Good 7.3

The information that was given was awful. Why would AA send a broken plane to ABW?

MIA
PHL
Excellent 10.0

Great fight ! The ground crew in Miami were so helpful

Fri, May 4
ONT
SEA
5h 10m
Sun, May 6
SEA
ONT
4h 08m
Trip: 3 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53874 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
MEL
LAX
Okay 5.6

The cabin crew were very kind and helpful, always smiling and happy to be of service.

It wasn't Air New Zealand, but operated by United Airlines. The plane was uncomfortable, and the entertainment system seemed clunky, unintuitive and outdated. The selection of entertainment, poor in quality, I thought. There were lost of things to watch, but a lot of it was of poor quality. The food was acceptable, but again, it felt like it was done on-the-cheap, and I was eating airline food a la 20 years ago.

EWR
IND
Good 7.0

Staff was excellent. From check in to flight crew. On time and earlier arrival. Unexpected.

Unable to bring some carryon. No coffee available on board.

TPA
ORD
Excellent 8.0

The crew were always really helpful and kind. They were happy to speak English or Japanese.

Despite stitching when I could and as soon as I could. Lower back buttocks hurt pretty bad half way through the flight. This is a knock on the airline industry and not so much ANA. Comfort levels start diminish when you try to squeeze as many seats as you can into airplane. Especially, for people like me who are at least 6' tall. Also, the food was very meh. This was surprising because all my other experiences with ANA were quite the opposite.

ORD
SAN
Okay 4.3

On time departure

No complementary food. Old plane, no great entertainment options (should also have subtitles for hard of hearing). Terminal boarding area was too cold.

DEN
SFO
Excellent 8.6

Good flight with no issues.

No complaints

Sat, Jun 2
ONT
SEA
4h 36m
Sun, Jun 3
SEA
ONT
4h 08m
Trip: 2 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53874 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
TPA
ORD
Excellent 8.0

The crew were always really helpful and kind. They were happy to speak English or Japanese.

Despite stitching when I could and as soon as I could. Lower back buttocks hurt pretty bad half way through the flight. This is a knock on the airline industry and not so much ANA. Comfort levels start diminish when you try to squeeze as many seats as you can into airplane. Especially, for people like me who are at least 6' tall. Also, the food was very meh. This was surprising because all my other experiences with ANA were quite the opposite.

DEN
SFO
Excellent 8.6

Good flight with no issues.

No complaints

SFO
LAS
Excellent 8.0

On time

IAD
CDG
Excellent 10.0

Got a window seat and had an amazing crew. Everything went smoothly! Dinner and breakfast served!

Everything was perfect!

MBJ
EWR
Okay 5.6

Not a whole lot, the flight and comfort were fine. The flight attendants were great.

There was NO entertainment on board unless you paid $7.99, including watching the progress of the flight from Montego Bay, Jamaica to Newark.

Fri, Jun 1
ONT
SEA
22h 06m
Wed, Jun 6
SEA
ONT
14h 07m
Trip: 6 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 33594 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SJC
LAS
Mediocre 2.0

couldn't change my reservation even though I made it less than 24 hours

The service

SLC
ATL
Excellent 10.0

I had my own row the whole trip.

SFO
ATL
Mediocre 2.0

Nothing

Everything was horrible!

ATL
LAS
Good 6.0

The crew was very friendly.

The seats were close together and not very comfortable. No entertainment, for example a movie for a 4 hour flight. You have to pay for everything. Only thing complimentary is water.

DEN
SNA
Good 6.6

Basic service but smooth.

No food or drinks.

Sat, Mar 24
ONT
SEA
2h 39m
Wed, Mar 28
SEA
ONT
2h 25m
Trip: 5 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 82 reviews
Overall
8.6
Boarding
8.7
Comfort
8.4
Crew
8.9
Entertainment
7.9
Food
8.0
ONT
SEA
Excellent 8.6

Need more fruit or veggie snack option No movie player option

ONT
SEA
Excellent 8.3

Good selection of entertainment (movies).

ONT
SEA
Excellent 8.6

Food I purchased was very good

Food was not priced well. NO WIFI??? WHAT?

ONT
SEA
Excellent 10.0

On time courteous

ONT
SEA
Excellent 10.0

The flight was pleasant. The cabin attendants were cordial and made sure everyone's needs were met. Air temperature was excellent and luckily we didn't have any turbulence.

II was hoping to get a $79 fair to Seattle and had to pay three times that plus baggage fee.

Fri, Jan 26
ONT
SEA
6h 35m
Mon, Jan 29
SEA
ONT
5h 10m
Trip: 4 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53874 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
TPA
ORD
Excellent 8.0

The crew were always really helpful and kind. They were happy to speak English or Japanese.

Despite stitching when I could and as soon as I could. Lower back buttocks hurt pretty bad half way through the flight. This is a knock on the airline industry and not so much ANA. Comfort levels start diminish when you try to squeeze as many seats as you can into airplane. Especially, for people like me who are at least 6' tall. Also, the food was very meh. This was surprising because all my other experiences with ANA were quite the opposite.

EWR
CMH
Good 6.8

The onboard wifi was not working.

DEN
SFO
Excellent 8.6

Good flight with no issues.

No complaints

RST
ORD
Okay 5.3

Efficient boarding and on time departure/arrival.

No complementary food. Old plane, no great entertainment options (should also have subtitles for hard of hearing).

LAX
BJX
Excellent 10.0

On time, no issues.

Fri, Mar 2
ONT
SEA
2h 40m
Mon, Mar 5
SEA
ONT
2h 34m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Fri, Mar 30
ONT
SEA
2h 44m
Sun, Apr 8
SEA
ONT
2h 25m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Jul 4
ONT
SEA
2h 40m
Mon, Jul 9
SEA
ONT
2h 30m
Trip: 6 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 82 reviews
Overall
8.6
Boarding
8.7
Comfort
8.4
Crew
8.9
Entertainment
7.9
Food
8.0
ONT
SEA
Excellent 10.0

The trip was smooth and worry free

Everything was great. As a matter of fact, I shared in a couple of recent conversations how much I like Alaska.

ONT
SEA
Excellent 8.6

Need more fruit or veggie snack option No movie player option

ONT
SEA
Excellent 10.0

Fast check-in

ONT
SEA
Good 7.0

My luggage was ripped open when I picked it up from the baggage claim in Ontario, CA.

ONT
SEA
Excellent 10.0

The flight was pleasant. The cabin attendants were cordial and made sure everyone's needs were met. Air temperature was excellent and luckily we didn't have any turbulence.

II was hoping to get a $79 fair to Seattle and had to pay three times that plus baggage fee.

Fri, Apr 27
ONT
SEA
2h 44m
Sat, May 5
SEA
ONT
2h 30m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Fri, May 4
ONT
SEA
2h 44m
Sun, May 6
SEA
ONT
2h 30m
Trip: 3 days
Overall 0.0 Poor
Based on 0 reviews
Sat, May 12
ONT
SEA
2h 38m
Sun, May 20
SEA
ONT
2h 30m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Jun 2
ONT
SEA
2h 40m
Sat, Jun 9
SEA
ONT
2h 34m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews

Ontario to Seattle Flight Information

Avg. Flight Duration 2h 35m
Flights Arrive in Seattle
Flights Depart from Ontario
Flight Price $137
Distance 968 miles
Airlines Alaska Airlines, United, Frontier, American Airlines
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

^
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.