Southwest® flights from Baltimore/Washington to Ontario/LA from $193

Promo Code

Low fares from Baltimore/Washington to Ontario/LA

$

Baltimore/Washington (BWI)to

Ontario/LA (ONT)
Depart: 11/10/2026

One-way

Basic

From
$193
Seen: 22 hrs ago

Baltimore/Washington (BWI)to

Ontario/LA (ONT)
Depart: 12/09/2026

One-way

Basic

From
$193
Seen: 21 hrs ago

Baltimore/Washington (BWI)to

Ontario/LA (ONT)
Depart: 12/05/2026

One-way

Basic

From
$193
Seen: 10 hrs ago

Baltimore/Washington (BWI)to

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

One-way

Basic

From
$193
Seen: 9 hrs ago

Baltimore/Washington (BWI)to

Ontario/LA (ONT)
Depart: 10/21/2026

One-way

Basic

From
$193
Seen: 6 hrs ago

Baltimore/Washington (BWI)to

Ontario/LA (ONT)
Depart: 12/03/2026

One-way

Basic

From
$193
Seen: 23 hrs ago

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Explore flights from Baltimore/Washington to Ontario/LA

Oct 2026
From$193*
Seen: 6 hrs ago
One Way/Basic
Nov 2026
From$193*
Seen: 9 hrs ago
One Way/Basic
Dec 2026
From$193*
Seen: 23 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $193
cmp-daily-histogram-bars-legend-max-price-aria-label $340
Displaying fares for October-2026
  • BWI–ONT, 10/01/2026: From $314
    01

    Thu

    OCT

  • BWI–ONT, 10/02/2026: From $314
    02

    Fri

  • BWI–ONT, 10/03/2026: From $314
    03

    Sat

  • BWI–ONT, 10/04/2026: From $314
    04

    Sun

  • BWI–ONT, 10/05/2026: From $314
    05

    Mon

  • BWI–ONT, 10/06/2026: From $314
    06

    Tue

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

    Wed

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    08

    Thu

  • BWI–ONT, 10/09/2026: From $340
    09

    Fri

  • BWI–ONT, 10/10/2026: From $314
    10

    Sat

  • BWI–ONT, 10/11/2026: From $314
    11

    Sun

  • BWI–ONT, 10/12/2026: From $314
    12

    Mon

  • BWI–ONT, 10/13/2026: From $314
    13

    Tue

  • BWI–ONT, 10/14/2026: From $314
    14

    Wed

  • BWI–ONT, 10/15/2026: From $314
    15

    Thu

  • BWI–ONT, 10/16/2026: From $334
    16

    Fri

  • BWI–ONT, 10/17/2026: From $314
    17

    Sat

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    18

    Sun

  • BWI–ONT, 10/19/2026: From $314
    19

    Mon

  • BWI–ONT, 10/20/2026: From $314
    20

    Tue

  • BWI–ONT, 10/21/2026: From $193
    21

    Wed

  • BWI–ONT, 10/22/2026: From $253
    22

    Thu

  • BWI–ONT, 10/23/2026: From $226
    23

    Fri

  • BWI–ONT: cmp-view-offers-disclaimer. Find Offers
    24

    Sat

  • BWI–ONT, 10/25/2026: From $300
    25

    Sun

  • BWI–ONT, 10/26/2026: From $248
    26

    Mon

  • BWI–ONT, 10/27/2026: From $193
    27

    Tue

  • BWI–ONT, 10/28/2026: From $193
    28

    Wed

  • BWI–ONT, 10/29/2026: From $198
    29

    Thu

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

    Fri

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

    Sat

    • Range$193-$340

    *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

    Route Information

    152† Weekly flights
    • 1‡ Nonstop flight per day Monday through Friday
    • 1‡ Nonstop flight on Saturday
    • 1‡ Nonstop flight on Sunday

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    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.

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