Southwest® flights from Ontario/LA to Baltimore/Washington from $182

Promo Code

Low fares from Ontario/LA to Baltimore/Washington

$

Ontario/LA (ONT)to

Baltimore/Washington (BWI)
Depart: 09/06/2026

One-way

Basic

From
$182
Seen: 2 hrs ago

Ontario/LA (ONT)to

Baltimore/Washington (BWI)
Depart: 09/11/2026

One-way

Basic

From
$182
Seen: 5 hrs ago

Ontario/LA (ONT)to

Baltimore/Washington (BWI)
Depart: 09/05/2026

One-way

Basic

From
$182
Seen: 22 hrs ago

Ontario/LA (ONT)to

Baltimore/Washington (BWI)
Depart: 09/12/2026

One-way

Basic

From
$201
Seen: 57 minutes ago

Ontario/LA (ONT)to

Baltimore/Washington (BWI)
Depart: 10/22/2026

One-way

Basic

From
$206
Seen: 16 hrs ago

Ontario/LA (ONT)to

Baltimore/Washington (BWI)
Depart: 10/20/2026

One-way

Basic

From
$206
Seen: 14 hrs ago

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Explore flights from Ontario/LA to Baltimore/Washington

Aug 2026
From$206*
Seen: 3 hrs ago
One Way/Basic
Sep 2026
From$182*
Seen: 5 hrs ago
One Way/Basic
Oct 2026
From$206*
Seen: 23 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $206
cmp-daily-histogram-bars-legend-max-price-aria-label $330
Displaying fares for August-2026
  • ONT–BWI: cmp-view-offers-disclaimer. Find Offers
    02

    Sun

    AUG

  • ONT–BWI, 08/03/2026: From $304
    03

    Mon

  • ONT–BWI, 08/04/2026: From $304
    04

    Tue

  • ONT–BWI, 08/05/2026: From $304
    05

    Wed

  • ONT–BWI, 08/06/2026: From $304
    06

    Thu

  • ONT–BWI, 08/07/2026: From $304
    07

    Fri

  • ONT–BWI, 08/08/2026: From $304
    08

    Sat

  • ONT–BWI, 08/09/2026: From $330
    09

    Sun

  • ONT–BWI, 08/10/2026: From $304
    10

    Mon

  • ONT–BWI, 08/11/2026: From $304
    11

    Tue

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

    Wed

  • ONT–BWI, 08/13/2026: From $304
    13

    Thu

  • ONT–BWI: cmp-view-offers-disclaimer. Find Offers
    14

    Fri

  • ONT–BWI, 08/15/2026: From $299
    15

    Sat

  • ONT–BWI, 08/16/2026: From $304
    16

    Sun

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

    Mon

  • ONT–BWI, 08/18/2026: From $304
    18

    Tue

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

    Wed

  • ONT–BWI, 08/20/2026: From $304
    20

    Thu

  • ONT–BWI, 08/21/2026: From $251
    21

    Fri

  • ONT–BWI, 08/22/2026: From $206
    22

    Sat

  • ONT–BWI, 08/23/2026: From $295
    23

    Sun

  • ONT–BWI, 08/24/2026: From $206
    24

    Mon

  • ONT–BWI, 08/25/2026: From $206
    25

    Tue

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

    Wed

  • ONT–BWI, 08/27/2026: From $206
    27

    Thu

  • ONT–BWI, 08/28/2026: From $251
    28

    Fri

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

    Sat

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

    Sun

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

    Mon

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

    Tue

    SEP

    • Range$206-$330

    *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:
    LA/Ontario International Airport
    Arriving at:
    Balt./Wash. International Airport
    Average flight time:
    4 hours 48 minutes
    Distance:
    2283 miles

    Route Information

    153† 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 Ontario/LA to Baltimore/Washington is 4 hours 48 minutes.
    There are 153 weekly flights from Ontario/LA to Baltimore/Washington on Southwest Airlines.
    Yes, Southwest flies nonstop from Ontario/LA to Baltimore/Washington once per day from Monday through Friday.
    Yes, Southwest flies nonstop from Ontario/LA to Baltimore/Washington once per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly Ontario/LA to Baltimore/Washington with Southwest, check out our Low Fare Calendar.
    You can rent a car at Balt./Wash. International Airport book yours with your flight.
    Yes! Flights from Ontario/LA to Baltimore/Washington—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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