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

Promo Code

Low fares from Ontario/LA to Baltimore/Washington

$

Ontario/LA (ONT)to

Baltimore/Washington (BWI)
Depart: 01/19/2027

One-way

Basic

From
$188
Seen: 7 hrs ago

Ontario/LA (ONT)to

Baltimore/Washington (BWI)
Depart: 11/26/2026

One-way

Basic

From
$188
Seen: 15 hrs ago

Ontario/LA (ONT)to

Baltimore/Washington (BWI)
Depart: 11/10/2026

One-way

Basic

From
$188
Seen: 25 minutes ago

Ontario/LA (ONT)to

Baltimore/Washington (BWI)
Depart: 01/21/2027

One-way

Basic

From
$188
Seen: 1 hour ago

Ontario/LA (ONT)to

Baltimore/Washington (BWI)
Depart: 12/16/2026

One-way

Basic

From
$188
Seen: 23 hrs ago

Ontario/LA (ONT)to

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

One-way

Basic

From
$188
Seen: 23 hrs ago

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Explore flights from Ontario/LA to Baltimore/Washington

Oct 2026
From$324*
Seen: 3 hrs ago
One Way/Basic
Nov 2026
From$188*
Seen: 23 hrs ago
One Way/Basic
Dec 2026
From$188*
Seen: 6 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $188
cmp-daily-histogram-bars-legend-max-price-aria-label $379
Displaying fares for October-2026
  • ONT–BWI, 10/23/2026: From $324
    23

    Fri

    OCT

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

    Sat

  • ONT–BWI, 10/25/2026: From $370
    25

    Sun

  • ONT–BWI, 10/26/2026: From $324
    26

    Mon

  • ONT–BWI: cmp-view-offers-disclaimer. Find Offers
    27

    Tue

  • ONT–BWI, 10/28/2026: From $324
    28

    Wed

  • ONT–BWI, 10/29/2026: From $324
    29

    Thu

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

    Fri

  • ONT–BWI, 10/31/2026: From $379
    31

    Sat

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

    Sun

    NOV

  • ONT–BWI: cmp-view-offers-disclaimer. Find Offers
    02

    Mon

  • ONT–BWI, 11/03/2026: From $379
    03

    Tue

  • ONT–BWI, 11/04/2026: From $324
    04

    Wed

  • ONT–BWI: cmp-view-offers-disclaimer. Find Offers
    05

    Thu

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

    Fri

  • ONT–BWI, 11/07/2026: From $379
    07

    Sat

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

    Sun

  • ONT–BWI, 11/09/2026: From $188
    09

    Mon

  • ONT–BWI, 11/10/2026: From $188
    10

    Tue

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

    Wed

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

    Thu

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

    Fri

  • ONT–BWI, 11/14/2026: From $193
    14

    Sat

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

    Sun

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

    Mon

  • ONT–BWI, 11/17/2026: From $188
    17

    Tue

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

    Wed

  • ONT–BWI, 11/19/2026: From $310
    19

    Thu

  • ONT–BWI, 11/20/2026: From $310
    20

    Fri

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

    Sat

  • ONT–BWI, 11/22/2026: From $310
    22

    Sun

    • Range$188-$379

    *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

    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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