Southwest® flights from Baltimore/Washington to Ontario/LA from $188

Promo Code

Low fares from Baltimore/Washington to Ontario/LA

$

Baltimore/Washington (BWI)to

Ontario/LA (ONT)
Depart: 12/15/2026

One-way

Basic

From
$188
Seen: 13 hrs ago

Baltimore/Washington (BWI)to

Ontario/LA (ONT)
Depart: 12/02/2026

One-way

Basic

From
$188
Seen: 12 hrs ago

Baltimore/Washington (BWI)to

Ontario/LA (ONT)
Depart: 01/16/2027

One-way

Basic

From
$188
Seen: 22 hrs ago

Baltimore/Washington (BWI)to

Ontario/LA (ONT)
Depart: 01/20/2027

One-way

Basic

From
$188
Seen: 22 hrs ago

Baltimore/Washington (BWI)to

Ontario/LA (ONT)
Depart: 12/12/2026

One-way

Basic

From
$188
Seen: 7 hrs ago

Baltimore/Washington (BWI)to

Ontario/LA (ONT)
Depart: 11/18/2026

One-way

Basic

From
$188
Seen: 8 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Baltimore/Washington to Ontario/LA

Oct 2026
From$324*
Seen: 18 hrs ago
One Way/Basic
Nov 2026
From$188*
Seen: 8 hrs ago
One Way/Basic
Dec 2026
From$188*
Seen: 1 hour ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $188
cmp-daily-histogram-bars-legend-max-price-aria-label $324
Displaying fares for October-2026
  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    20

    Tue

    OCT

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    21

    Wed

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    22

    Thu

  • BWI–ONT, 10/23/2026: From $324
    23

    Fri

  • BWI–ONT, 10/24/2026: From $324
    24

    Sat

  • BWI–ONT, 10/25/2026: From $324
    25

    Sun

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    26

    Mon

  • BWI–ONT, 10/27/2026: From $324
    27

    Tue

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    28

    Wed

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    29

    Thu

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    30

    Fri

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    31

    Sat

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    01

    Sun

    NOV

  • BWI–ONT, 11/02/2026: From $324
    02

    Mon

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    03

    Tue

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    04

    Wed

  • BWI–ONT, 11/05/2026: From $324
    05

    Thu

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    06

    Fri

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    07

    Sat

  • BWI–ONT, 11/08/2026: From $324
    08

    Sun

  • BWI–ONT, 11/09/2026: From $324
    09

    Mon

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    10

    Tue

  • BWI–ONT, 11/11/2026: From $188
    11

    Wed

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    12

    Thu

  • BWI–ONT, 11/13/2026: From $190
    13

    Fri

  • BWI–ONT, 11/14/2026: From $188
    14

    Sat

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    15

    Sun

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    16

    Mon

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    17

    Tue

  • BWI–ONT, 11/18/2026: From $188
    18

    Wed

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    19

    Thu

    • Range$188-$324

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    Balt./Wash. International Airport
    Arriving at:
    LA/Ontario International Airport
    Average flight time:
    5 hours 27 minutes
    Distance:
    2283 miles

    Questions we hear the most

    The average flight time from Baltimore/Washington to Ontario/LA is 5 hours 27 minutes.
    There are 152 weekly flights from Baltimore/Washington to Ontario/LA on Southwest Airlines.
    Yes, Southwest flies nonstop from Baltimore/Washington to Ontario/LA once per day from Monday through Friday.
    Yes, Southwest flies nonstop from Baltimore/Washington to Ontario/LA once per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly Baltimore/Washington to Ontario/LA with Southwest, check out our Low Fare Calendar.
    You can rent a car at LA/Ontario International Airport book yours with your flight.
    Yes! Flights from Baltimore/Washington to Ontario/LA—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

    Explore Flights from Other Popular Origins

    Popular Flights from Baltimore/Washington