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Cheap flights from Baltimore to Los Angeles from $101

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Baltimore to Los Angeles departing on 9/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Frontier Logo
6:27 pm - 7:54 pmBWI-ONT
28h 27m1 stop
Frontier Logo
8:59 pm - 5:42 pmONT-BWI
17h 43m1 stop
$164Frontier
Find Deal
Fri, Sep 12 - Sun, Sep 14
Frontier Logo
9:42 pm - 7:49 amBWI-ONT
13h 07m1 stop
Frontier Logo
6:53 am - 5:44 pmONT-BWI
7h 51m1 stop
$165Frontier
Find Deal
Thu, Oct 23 - Mon, Oct 27
Frontier Logo
6:27 pm - 7:54 pmBWI-ONT
28h 27m1 stop
Frontier Logo
8:59 pm - 5:42 pmONT-BWI
17h 43m1 stop
$166Frontier
Find Deal
Fri, Sep 26 - Sun, Sep 28
Frontier Logo
9:42 pm - 7:49 amBWI-ONT
13h 07m1 stop
Frontier Logo
6:53 am - 5:44 pmONT-BWI
7h 51m1 stop
$167Frontier
Find Deal
Thu, Oct 23 - Mon, Oct 27
Frontier Logo
6:27 pm - 7:54 pmBWI-ONT
28h 27m1 stop
Frontier Logo
8:59 pm - 5:42 pmONT-BWI
17h 43m1 stop
$185Frontier
Find Deal
Mon, Sep 8 - Thu, Sep 11
Frontier Logo
6:27 pm - 7:23 amBWI-ONT
15h 56m1 stop
Frontier Logo
8:59 pm - 5:42 pmONT-BWI
17h 43m1 stop
$194Frontier
Find Deal
Sun, Sep 7 - Thu, Sep 11
Frontier Logo
6:27 pm - 7:54 pmBWI-ONT
28h 27m1 stop
Frontier Logo
8:59 pm - 5:42 pmONT-BWI
17h 43m1 stop
$209Frontier
Find Deal
Fri, Sep 26 - Sun, Sep 28
Frontier Logo
6:27 pm - 7:53 amBWI-ONT
16h 26m1 stop
Frontier Logo
6:53 am - 5:44 pmONT-BWI
7h 51m1 stop
$210Frontier
Find Deal
Sun, Oct 5 - Sun, Oct 19
Logo
7:02 pm - 9:56 pmBWI-ONT
29h 54m1 stop
Logo
9:16 am - 4:30 amONT-BWI
16h 14m1 stop
$223
Find Deal
Mon, Sep 22 - Thu, Sep 25
Logo
6:50 pm - 7:54 pmBWI-ONT
28h 04m2 stops
Logo
6:00 am - 5:57 pmONT-BWI
8h 57m1 stop
$226
Find Deal
Mon, Sep 22 - Thu, Sep 25

Frontier flights from Baltimore to Ontario

Our best Frontier deals on Baltimore to Ontario flight tickets
Frontier
Sep 12
BWI6:27 pmBaltimore/Washington
28h 27m
1 stop
ONT7:54 pmOntario
Sep 14
ONT8:59 pmOntario
17h 43m
1 stop
BWI5:42 pmBaltimore/Washington
$164
Find similar
Frontier
Oct 23
BWI9:42 pmBaltimore/Washington
13h 07m
1 stop
ONT7:49 amOntario
Oct 27
ONT6:53 amOntario
7h 51m
1 stop
BWI5:44 pmBaltimore/Washington
$165
Find similar
Frontier
Sep 26
BWI6:27 pmBaltimore/Washington
28h 27m
1 stop
ONT7:54 pmOntario
Sep 28
ONT8:59 pmOntario
17h 43m
1 stop
BWI5:42 pmBaltimore/Washington
$166
Find similar

Delta flights from Baltimore to Ontario

Our best Delta deals on Baltimore to Ontario flight tickets
Delta
Sep 9
BWI5:40 amBaltimore/Washington
7h 55m
1 stop
ONT10:35 amOntario
Sep 17
ONT10:00 pmOntario
8h 13m
1 stop
BWI9:13 amBaltimore/Washington
$357
Find similar
Delta
Sep 9
BWI1:35 pmBaltimore/Washington
8h 36m
1 stop
ONT7:11 pmOntario
Sep 11
ONT10:00 pmOntario
8h 13m
1 stop
BWI9:13 amBaltimore/Washington
$417
Find similar
Delta
Sep 3
BWI5:40 amBaltimore/Washington
7h 55m
1 stop
ONT10:35 amOntario
Sep 11
ONT10:00 pmOntario
8h 13m
1 stop
BWI9:13 amBaltimore/Washington
$457
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Baltimore 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, momondo users made 832,500 searches. Data last updated August 27, 2025.
Use the filters below to find and compare flights from Baltimore to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Fri 9/12

6:27 pm-7:54 pm

1 stop28h 27m

Ontario

Sun 9/14

8:59 pm-5:42 pm

1 stop17h 43m

$164

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Thu 10/23

9:42 pm-7:49 am

1 stop13h 07m

Ontario

Mon 10/27

6:53 am-5:44 pm

1 stop7h 51m

$165

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Fri 9/26

6:27 pm-7:54 pm

1 stop28h 27m

Ontario

Sun 9/28

8:59 pm-5:42 pm

1 stop17h 43m

$166

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Thu 10/23

9:42 pm-7:49 am

1 stop13h 07m

Ontario

Mon 10/27

6:53 am-5:44 pm

1 stop7h 51m

$167

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Mon 9/8

6:27 pm-7:54 pm

1 stop28h 27m

Ontario

Thu 9/11

8:59 pm-5:42 pm

1 stop17h 43m

$185

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Sun 9/7

6:27 pm-7:23 am

1 stop15h 56m

Ontario

Thu 9/11

8:59 pm-5:42 pm

1 stop17h 43m

$194

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Fri 9/26

6:27 pm-7:54 pm

1 stop28h 27m

Ontario

Sun 9/28

8:59 pm-5:42 pm

1 stop17h 43m

$209

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Sun 10/5

6:27 pm-7:53 am

1 stop16h 26m

Ontario

Sun 10/19

6:53 am-5:44 pm

1 stop7h 51m

$210

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Mon 9/22

7:02 pm-9:56 pm

1 stop29h 54m

Ontario

Thu 9/25

9:16 am-4:30 am

1 stop16h 14m

$223

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Mon 9/22

6:50 pm-7:54 pm

2 stops28h 04m

Ontario

Thu 9/25

6:00 am-5:57 pm

1 stop8h 57m

$226

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Los Angeles from

How to get the cheapest flight ticket from Baltimore to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Ontario?

In general, August is the cheapest month to fly from Baltimore to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $361. If you aren’t able to travel during the month of August, then book flights to Ontario from Baltimore during October instead. Flights to Ontario in October, while not as cheap as those in August, still average around $367.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $323. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Baltimore to Ontario for around $480.

What is the cheapest time of day to depart on your flight to Ontario?

In the afternoon is the cheapest time of day to fly from Baltimore to Ontario when you can find flight prices for as low as $366. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $431 on average. Flights to Ontario from Baltimore in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Baltimore/Washington to Ontario flight route?

Fly from Baltimore/Washington to Ontario for the best Baltimore/Washington - Ontario flight prices

How far in advance should I book a flight to Ontario?

You are more likely to see cheaper flights to Ontario from Baltimore when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $439 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Baltimore for as low as $328 on momondo.

What cabin class options are available on Baltimore/Washington to Ontario flights?

There is only 1 cabin class available to choose from on Baltimore/Washington to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Baltimore to Ontario flight prices changed over time?

As of August 2025, prices for Baltimore to Ontario flights are approximately 14% more expensive when compared to flights at the same time last year.

When to book flights from Baltimore to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Baltimore to Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Baltimore to Ontario (BWI to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Baltimore to Ontario

Best Price Found

$168

Fastest flight time

5h 15m

Direct flights

Every day

Airports in Ontario

1 airport
The best one-way flight to Ontario from Baltimore in the past 72 hours is $168. The best round-trip flight deal from Baltimore to Ontario found on momondo in the last 72 hours is $337.
The fastest flight from Baltimore to Ontario takes 5h 15m
Direct flights go from Baltimore to Ontario every day.
There is 1 airport near Ontario: Ontario (ONT)
Search flight deals

  • How far is Baltimore/Washington to Ontario by plane?

    Ontario is 2281.3 mi away from Baltimore/Washington. By plane, this route typically takes 7h 54m.

  • When did momondo last update prices for flights from Baltimore/Washington Airport to Ontario Airport?

    Prices for flights from Baltimore/Washington Airport to Ontario Airport refresh daily.

  • How many operators does momondo search for flights from Baltimore/Washington Airport to Ontario Airport?

  • How old do you have to be to fly from Baltimore/Washington Airport to Ontario Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Baltimore/Washington Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Baltimore to Ontario?

  • What is the most popular airline from Baltimore to Ontario?

Best airlines flying from Baltimore to Ontario

Compare and see reviews for airlines that fly from Baltimore to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $188Free CancellationRating
5.8
3,202 reviews
Search Frontier flights
United AirlinesPriceFrom $218Free CancellationRating
7.4
8,945 reviews
Search United Airlines flights
SouthwestPriceFrom $326Free CancellationRating
8.0
4,241 reviews
Search Southwest flights
DeltaPriceFrom $327Free CancellationRating
7.9
7,977 reviews
Search Delta flights
American AirlinesPriceFrom $336Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

  • Southwest Flights From Baltimore to Ontario

    Across 5 Southwest flights from Baltimore to Ontario this week, the average price was $462, with the best Southwest deals starting from $326 round-trip. 4,241 users have rated Southwest on momondo, with an average score of 8.0/10.

Why use momondo?

Why should I use momondo to find a flight deal from Baltimore to Ontario?

It is quick and easy to find Baltimore to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

Can I find flights from Baltimore to Ontario with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Baltimore to Ontario flights to just show those with flexible booking policies.

How can momondo help me find flights from Baltimore to Ontario?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Baltimore to Ontario.

I’m not ready to book a flight from Baltimore to Ontario right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Baltimore to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.

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