Find Cheap Flights from Ontario to Baltimore/Washington (ONT - BWI)

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Good to Know

Average Price:
$443
(avg. price over the last 2 weeks)
Good Deal:
$344
or less (round trip)

When to Book Flights from Ontario to Baltimore/Washington

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 $344 or less.
The cheapest flight from Ontario to Baltimore/Washington was found 69 days before departure, on average.
Book at least 2 weeks before departure in order to get a below-average price.
Morning departure is around 12% 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 Ontario to Baltimore/Washington Flights

How long does a flight from Ontario to Baltimore/Washington take?
An average nonstop flight takes 6h 28m, covering a distance of 2279 miles.
Which airlines provide the cheapest flights from Ontario to Baltimore/Washington?
In the past 3 days, the cheapest round-trip tickets were found on American Airlines ($268), Multiple Airlines ($268) and United ($272).
Do I need a passport to fly between Ontario and Baltimore/Washington?
No.
What’s the cheapest day of the week to fly Ontario to Baltimore/Washington?
For Ontario to Baltimore/Washington, Tuesday is the cheapest day to fly on average and Monday is the most expensive. Flying from Baltimore/Washington back to Ontario, the best deals are generally found on Tuesday, with Monday being the most expensive.

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

Airports
Origin
Ontario
$268
only
$268
Destination
Baltimore
$268
only
$268
Tue, Apr 17
ONT
BWI
7h 00m
Tue, May 15
BWI
ONT
7h 47m
Trip: 29 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
ORD
CLT
Mediocre 3.0

Three hours delay. I paid for a upgrade to first class. But because of the flight change i didn't get to keep my upgrade and I had to beg for a refund. I have had two trips in the past 5 days and all flights have been anywhere from 1 to 3 hours late. Worst experience with AA I have had in a long time.

LAS
DFW
Excellent 8.0

Flight was punctual and service was good.

Gate change

SJU
MIA
Excellent 9.3

New onboard entertainment

LHR
ORD
Mediocre 2.0

Nothing really. I will never book from Kayak ever

Everything

SAT
PHL
Excellent 8.0

I took American's first direct flight between Philadelphia and San Antonio. It was a nice plane, good service, and amenities for a cost. Love that the plane had plugs!

Tue, May 1
ONT
BWI
6h 42m
Tue, May 8
BWI
ONT
7h 47m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Apr 18
ONT
BWI
6h 34m
Sat, May 12
BWI
ONT
8h 31m
Trip: 25 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 54591 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.4
DEN
IAH
Mediocre 2.0

Nothing

Never made it. Stuck in Denver.

FSD
DEN
Mediocre 2.0

Friendly crew.

Stuck in Denver because our flight was delayed so we missed our connection to Houston. Couldn’t get a hotel voucher because they are claiming a weather delay (which there was none).

LAX
LHR
Excellent 10.0

United Airlines team and the plaine were brilliant.

DEN
LAX
Okay 5.0

Great crew and process

For the fare, the leg room is not enough for average 6'0 person to be comfortable for longer than an hour.

IAD
GVA
Excellent 10.0

Best flight I have ever experienced!

Nothing

Mon, Mar 5
ONT
BWI
8h 31m
Mon, Mar 12
BWI
ONT
9h 23m
Trip: 7 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 16027 reviews
Overall
8.0
Boarding
8.1
Comfort
7.8
Crew
8.4
Entertainment
7.5
Food
7.4
ECP
ATL
Excellent 9.6

We have been on 6 flights over the last 8 days, all with Delta and we have already started telling people how wonderful the service was. Sherry on this last flight was amazing, working so hard all by herself as our flight attendant. We were very impressed. And the pilots all came out to say goodbye and thank you. All very nice...esp for me who needed some wheelchair assistance. We will certainly fly with you again in the future.

Smaller plane but ok for short flight

SMF
ATL
Excellent 8.6

The crew were so polite and happy!

Those seats! UGH!

BOS
ATL
Okay 4.0

Comfort Plus allowed us to board early, useful USB ports.

ATL
JNB
Okay 4.0

Aircraft seemed shabby despite refresh of Comfort Plus, food was really mediocre. Steer clear of the Asian Veg option.

DTW
MEX
Excellent 8.3

Even though I was disappointed by not being able to get the boarding passes from Delta for Aeromexico’s connecting flight to Bogota, I had an agent greet me after customs in Mexico to issue the boarding pass so I could use the transfer flight line. Excellent service throughout the entire trip.

Confusion over my boarding pass at the Delta terminal in Detroit.

Wed, Apr 18
ONT
BWI
7h 02m
Tue, May 15
BWI
ONT
7h 47m
Trip: 28 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
DCA
CLT
Excellent 8.6

My wife is hypoglycemic and requires food. The flight was so early that none of the terminal restaraunts were open, nor did the plain have food for any passengers accept first class. I've purchased a box on other flights, but this one did not provide an option for a box lunch or breakfast.

SJU
MIA
Excellent 9.3

New onboard entertainment

DFW
FLL
Excellent 8.0

No issues at all

N/A

ORD
CLT
Mediocre 3.0

Three hours delay. I paid for a upgrade to first class. But because of the flight change i didn't get to keep my upgrade and I had to beg for a refund. I have had two trips in the past 5 days and all flights have been anywhere from 1 to 3 hours late. Worst experience with AA I have had in a long time.

LHR
ORD
Mediocre 2.0

Nothing really. I will never book from Kayak ever

Everything

Wed, May 2
ONT
BWI
6h 42m
Tue, May 8
BWI
ONT
7h 47m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Feb 28
ONT
BWI
6h 28m
Tue, Mar 13
BWI
ONT
8h 17m
Trip: 13 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 54591 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.4
ORD
ATL
Okay 5.6

I was so pleased that United offered the flexibility to change my flight before the chicago snowstorm without incurring a change fee.

I paid for seats on my original flight. But ended up sitting separate from my traveling companion on the new flight.

LAX
LHR
Excellent 10.0

United Airlines team and the plaine were brilliant.

DEN
LAX
Okay 5.0

Great crew and process

For the fare, the leg room is not enough for average 6'0 person to be comfortable for longer than an hour.

IAH
HNL
Excellent 9.3

The flight crew was very welcoming and positive. They were attentive and ensures that every one had headsets, blanckets etc for the 8.5 hour flight.

Lacking food healthy food options. No salads or light bites available. The warm food that they did have was terrible and very salty. I wish their in-flight entertainment was not on our own devices because updates to the app are required which you wouldnt know unless you were on the plane and connected to their wifi.

SJO
IAH
Mediocre 3.3

The check-in staff were very friendly and helpful.

I already knew I was going to pay $200 to ship my boards back home (I wonder if golf clubs which are roughly the same size cost as much,) but when pre-purchasing through the app for an "oversized" bag you have to put a "one" in the checked bag and a "one" in the oversized bag even though they're the same bag, but then they charge you for two, and when you tell the check-in person that you only have one bag of course they can't issue a refund. No, they tell you that you get to call customer service when you return home.

Mon, Mar 12
ONT
BWI
8h 31m
Mon, Mar 19
BWI
ONT
9h 23m
Trip: 8 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 16027 reviews
Overall
8.0
Boarding
8.1
Comfort
7.8
Crew
8.4
Entertainment
7.5
Food
7.4
BOS
JFK
Excellent 9.3

The volume controls on the tv we’re pretty poor. Was either too loud or too soft with only 5-6 volume settings.

BOS
BNA
Excellent 8.0

Service vey Good. Nice choices. Comfort seating very nice

WiFi awful. Useless.

ATL
MEX
Excellent 10.0

Flight was on time, crew was friendly, plane was clean, and boarding was painless and efficient. Food was served which was a huge plus. I appreciate having a choice of almonds for a snack.

DTW
YOW
Excellent 9.3

Please see above. Sherry was amazing

Plane was small and older but it was a short flight

SJC
SLC
Excellent 8.8

Good clean aircraft. Fairly comfortable seats. Even had a power outlet in my row. Not too bad for an aircraft from the late 70s.

for some reason, i had to pay to gate check a bag. It didnt seem like anyone else did while boarding my flight.

Wed, Apr 11
ONT
BWI
6h 34m
Wed, Apr 18
BWI
ONT
7h 35m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Apr 11
ONT
BWI
7h 00m
Wed, Apr 18
BWI
ONT
7h 35m
Trip: 8 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
JFK
EZE
Excellent 9.0

Beautiful design n great storage

Hard to get out of seat unless in fully upright biz class position

SJU
MIA
Excellent 9.3

New onboard entertainment

LAS
DFW
Excellent 8.0

Flight was punctual and service was good.

Gate change

LHR
ORD
Mediocre 2.0

Nothing really. I will never book from Kayak ever

Everything

SAT
PHL
Excellent 8.0

I took American's first direct flight between Philadelphia and San Antonio. It was a nice plane, good service, and amenities for a cost. Love that the plane had plugs!

Tue, Mar 13
ONT
BWI
9h 14m
Mon, Mar 19
BWI
ONT
8h 17m
Trip: 7 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 54591 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.4
IAH
SAN
Mediocre 2.6

The staff were fine, nothing really great, but nothing bad either.

So, we'll start with boarding. Why airlines can't figure out to board the plane from back to front is beyond me. No, let's load front to back so everyone has to uncomfortably shove past the people who have already taken their seats at the front of the plane. Then you get back there and all the overhead bins are full because everyone takes as many bags as possible onto the plane. Then you have to sacrifice the already tiny amount of foot room, "to put the bag fully underneath the seat in front of you." At this point you should be fine, except if you're over five and a half feet tall (I don't know if that's true I'm 6'2" and 275 lbs,) because then your knees are going to be buried so deep in the chair in front of you that the person up there doesn't even need a seat they can just sit on your knees. Luckily for you tall people, they put a nice metal rod just about knee level to really dig in and cause pain . . . Yay! Being a big guy, you try to be considerate and fold your arms in to give the person next to you as much space as possible, but don't expect that back as they'll spread out and become as wide as possible. Then to distract yourself from the discomfort, you try to use the free in flight entertainment via the United app, but "it's not available right now." In summation either be short and small or be rich and buy the seats with extra legroom when you fly United.

LGA
IAH
Good 6.3

I was told that I had to gate check my bags which had all of the necessities to travel with my child ( snacks, books, toys) due to it being a full flight. When I boarded, there were still several overhead storage bins completely empty. Very annoying. The crew could have physicallt assessed and checked before assuming due to flight capacity.

IAD
GVA
Excellent 10.0

Best flight I have ever experienced!

Nothing

IAH
HNL
Excellent 9.3

The flight crew was very welcoming and positive. They were attentive and ensures that every one had headsets, blanckets etc for the 8.5 hour flight.

Lacking food healthy food options. No salads or light bites available. The warm food that they did have was terrible and very salty. I wish their in-flight entertainment was not on our own devices because updates to the app are required which you wouldnt know unless you were on the plane and connected to their wifi.

DEN
LAX
Okay 5.0

Great crew and process

For the fare, the leg room is not enough for average 6'0 person to be comfortable for longer than an hour.

Tue, Apr 17
ONT
BWI
7h 00m
Sat, May 12
BWI
ONT
7h 16m
Trip: 26 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
SJU
MIA
Excellent 9.3

New onboard entertainment

CLT
ILM
Mediocre 3.0

Three hours delay. I paid for a upgrade to first class. But because of the flight change i didn't get to keep my upgrade and I had to beg for a refund. I have had two trips in the past 5 days and all flights have been anywhere from 1 to 3 hours late. Worst experience with AA I have had in a long time.

JFK
EZE
Excellent 9.0

Beautiful design n great storage

Hard to get out of seat unless in fully upright biz class position

JAX
DFW
Excellent 8.6

Polite. Clean. Nice business class.

Would like more Western food.

PHX
GEG
Good 7.3

The crew was friendly and informative. They were very helpful. The

The seats were uncomfortable. They were hard and so narrow I had to sit crooked in the seat to keep from getting banged into by the service carts and every person going by to the bathrooms. I'm not tiny, but I'm not huge either, it was just overcrowded. It was also very hot in the airplane the entire way from Phoenix to Spokane. My husband, who is always cold, was even hot.

Wed, Apr 25
ONT
BWI
7h 02m
Sat, Apr 28
BWI
ONT
8h 31m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Mar 14
ONT
BWI
9h 14m
Mon, Mar 19
BWI
ONT
8h 17m
Trip: 6 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 54591 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.4
LGA
IAH
Good 6.3

I was told that I had to gate check my bags which had all of the necessities to travel with my child ( snacks, books, toys) due to it being a full flight. When I boarded, there were still several overhead storage bins completely empty. Very annoying. The crew could have physicallt assessed and checked before assuming due to flight capacity.

ORD
ATL
Okay 5.6

I was so pleased that United offered the flexibility to change my flight before the chicago snowstorm without incurring a change fee.

I paid for seats on my original flight. But ended up sitting separate from my traveling companion on the new flight.

FSD
DEN
Mediocre 2.0

Friendly crew.

Stuck in Denver because our flight was delayed so we missed our connection to Houston. Couldn’t get a hotel voucher because they are claiming a weather delay (which there was none).

LAX
LHR
Excellent 10.0

United Airlines team and the plaine were brilliant.

DFW
ORD
Excellent 10.0

I LIKE THE SERVICE ON BORD OF THE PLANE

NOTHING

Sat, Apr 28
ONT
BWI
7h 02m
Wed, May 2
BWI
ONT
7h 27m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Apr 19
ONT
BWI
7h 02m
Tue, May 15
BWI
ONT
7h 47m
Trip: 27 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
DCA
CLT
Excellent 8.6

My wife is hypoglycemic and requires food. The flight was so early that none of the terminal restaraunts were open, nor did the plain have food for any passengers accept first class. I've purchased a box on other flights, but this one did not provide an option for a box lunch or breakfast.

CLT
ILM
Mediocre 3.0

Three hours delay. I paid for a upgrade to first class. But because of the flight change i didn't get to keep my upgrade and I had to beg for a refund. I have had two trips in the past 5 days and all flights have been anywhere from 1 to 3 hours late. Worst experience with AA I have had in a long time.

JFK
EZE
Excellent 9.0

Beautiful design n great storage

Hard to get out of seat unless in fully upright biz class position

DFW
FLL
Excellent 8.0

No issues at all

N/A

PHX
GEG
Good 7.3

The crew was friendly and informative. They were very helpful. The

The seats were uncomfortable. They were hard and so narrow I had to sit crooked in the seat to keep from getting banged into by the service carts and every person going by to the bathrooms. I'm not tiny, but I'm not huge either, it was just overcrowded. It was also very hot in the airplane the entire way from Phoenix to Spokane. My husband, who is always cold, was even hot.

Thu, Apr 5
ONT
BWI
8h 57m
Tue, Apr 10
BWI
ONT
8h 40m
Trip: 6 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 54591 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.4
IAD
GVA
Excellent 10.0

Best flight I have ever experienced!

Nothing

DEN
IAH
Mediocre 2.0

Nothing

Never made it. Stuck in Denver.

FSD
DEN
Mediocre 2.0

Friendly crew.

Stuck in Denver because our flight was delayed so we missed our connection to Houston. Couldn’t get a hotel voucher because they are claiming a weather delay (which there was none).

IAH
SAN
Mediocre 2.6

The staff were fine, nothing really great, but nothing bad either.

So, we'll start with boarding. Why airlines can't figure out to board the plane from back to front is beyond me. No, let's load front to back so everyone has to uncomfortably shove past the people who have already taken their seats at the front of the plane. Then you get back there and all the overhead bins are full because everyone takes as many bags as possible onto the plane. Then you have to sacrifice the already tiny amount of foot room, "to put the bag fully underneath the seat in front of you." At this point you should be fine, except if you're over five and a half feet tall (I don't know if that's true I'm 6'2" and 275 lbs,) because then your knees are going to be buried so deep in the chair in front of you that the person up there doesn't even need a seat they can just sit on your knees. Luckily for you tall people, they put a nice metal rod just about knee level to really dig in and cause pain . . . Yay! Being a big guy, you try to be considerate and fold your arms in to give the person next to you as much space as possible, but don't expect that back as they'll spread out and become as wide as possible. Then to distract yourself from the discomfort, you try to use the free in flight entertainment via the United app, but "it's not available right now." In summation either be short and small or be rich and buy the seats with extra legroom when you fly United.

DEN
PSP
Okay 4.3

Paid for Econoplus seat but was assigned a seat in the row before the emergency exit. Seat uncomfortable didn’t recline had to go through refund process

Tue, Apr 24
ONT
BWI
7h 00m
Sat, Apr 28
BWI
ONT
7h 17m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Mar 1
ONT
BWI
7h 30m
Tue, Mar 13
BWI
ONT
8h 09m
Trip: 12 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
DCA
CLT
Excellent 8.6

My wife is hypoglycemic and requires food. The flight was so early that none of the terminal restaraunts were open, nor did the plain have food for any passengers accept first class. I've purchased a box on other flights, but this one did not provide an option for a box lunch or breakfast.

JFK
EZE
Excellent 9.0

Beautiful design n great storage

Hard to get out of seat unless in fully upright biz class position

JAX
DFW
Excellent 8.6

Polite. Clean. Nice business class.

Would like more Western food.

LAS
DFW
Excellent 8.0

Flight was punctual and service was good.

Gate change

SJU
MIA
Excellent 9.3

New onboard entertainment

Tue, Mar 13
ONT
BWI
6h 44m
Sat, Mar 17
BWI
ONT
7h 31m
Trip: 5 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 54591 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.4
IAD
GVA
Excellent 10.0

Best flight I have ever experienced!

Nothing

DFW
ORD
Excellent 10.0

I LIKE THE SERVICE ON BORD OF THE PLANE

NOTHING

LGA
IAH
Good 6.3

I was told that I had to gate check my bags which had all of the necessities to travel with my child ( snacks, books, toys) due to it being a full flight. When I boarded, there were still several overhead storage bins completely empty. Very annoying. The crew could have physicallt assessed and checked before assuming due to flight capacity.

DEN
IAH
Mediocre 2.0

Nothing

Never made it. Stuck in Denver.

LAX
LHR
Excellent 10.0

United Airlines team and the plaine were brilliant.

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Ontario to Baltimore/Washington Flight Information

Flights Arrive in Baltimore/Washington
Flights Depart from Ontario
Flight Price $268
Distance 2279 miles
Airlines American Airlines, United, Delta
*
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:

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

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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,
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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.