Flights from Chicago to Ontario (ORD to ONT)

Discover more affordable routes and cheaper dates from Chicago to Ontario (ORD to ONT) within a date range.

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  • US$292
    Hawaiian AirlinesHawaiian Airlines
    5:53pm - 11:59pm
    Fri Apr 11th 2025
    8h 6m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Fri Apr 11th 2025 Hawaiian Airlines · HA 6109 Depart at 5:53pm from Chicago (ORD) Fly for 4h 41m Arrive at 8:34pm in Seattle (SEA)

    Layover in Seattle for 0h 49m

    Fri Apr 11th 2025 Hawaiian Airlines · HA 6667 Depart at 9:23pm from Seattle (SEA) Fly for 2h 36m Arrive at 11:59pm in Ontario (ONT)

  • US$292
    Alaska AirlinesAlaska Airlines
    5:53pm - 11:59pm
    Fri Apr 11th 2025
    8h 6m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Fri Apr 11th 2025 Alaska Airlines · AS 335 Depart at 5:53pm from Chicago (ORD) Fly for 4h 41m Arrive at 8:34pm in Seattle (SEA)

    Layover in Seattle for 0h 49m

    Fri Apr 11th 2025 Alaska Airlines · AS 1003 Depart at 9:23pm from Seattle (SEA) Fly for 2h 36m Arrive at 11:59pm in Ontario (ONT)

  • US$330
    United AirlinesUnited Airlines
    7:10am - 12:38pm
    Sat Apr 12th 2025
    7h 28m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 791 Depart at 7:10am from Chicago (ORD) Fly for 2h 54m Arrive at 9:04am in Denver (DEN)

    Layover in Denver for 2h 11m

    Sat Apr 12th 2025 United Airlines · UA 430 Depart at 11:15am from Denver (DEN) Fly for 2h 23m Arrive at 12:38pm in Ontario (ONT)

  • US$331
    United AirlinesUnited Airlines
    4:10pm - 8:42pm
    Sat Apr 12th 2025
    6h 32m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 1801 Depart at 4:10pm from Chicago (ORD) Fly for 2h 55m Arrive at 6:05pm in Denver (DEN)

    Layover in Denver for 1h 14m

    Sat Apr 12th 2025 United Airlines · UA 1574 Depart at 7:19pm from Denver (DEN) Fly for 2h 23m Arrive at 8:42pm in Ontario (ONT)

  • US$331
    United AirlinesUnited Airlines
    12:45pm - 5:56pm
    Sat Apr 12th 2025
    7h 11m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 1878 Depart at 12:45pm from Chicago (ORD) Fly for 5h 1m Arrive at 3:46pm in San Francisco (SFO)

    Layover in San Francisco for 0h 39m

    Sat Apr 12th 2025 United Airlines · UA 4783 Depart at 4:25pm from San Francisco (SFO) Fly for 1h 31m Arrive at 5:56pm in Ontario (ONT)

  • US$331
    United AirlinesUnited Airlines
    2:35pm - 8:21pm
    Sat Apr 12th 2025
    7h 46m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 1577 Depart at 2:35pm from Chicago (ORD) Fly for 5h 1m Arrive at 5:36pm in San Francisco (SFO)

    Layover in San Francisco for 1h 19m

    Sat Apr 12th 2025 United Airlines · UA 794 Depart at 6:55pm from San Francisco (SFO) Fly for 1h 26m Arrive at 8:21pm in Ontario (ONT)

  • US$331
    United AirlinesUnited Airlines
    3:55pm - 9:58pm
    Sat Apr 12th 2025
    8h 3m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 1124 Depart at 3:55pm from Chicago (ORD) Fly for 3h 0m Arrive at 6:55pm in Houston (IAH)

    Layover in Houston for 1h 25m

    Sat Apr 12th 2025 United Airlines · UA 1563 Depart at 8:20pm from Houston (IAH) Fly for 3h 38m Arrive at 9:58pm in Ontario (ONT)

  • US$331
    United AirlinesUnited Airlines
    2:35pm - 8:42pm
    Sat Apr 12th 2025
    8h 7m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 1588 Depart at 2:35pm from Chicago (ORD) Fly for 2h 55m Arrive at 4:30pm in Denver (DEN)

    Layover in Denver for 2h 49m

    Sat Apr 12th 2025 United Airlines · UA 1574 Depart at 7:19pm from Denver (DEN) Fly for 2h 23m Arrive at 8:42pm in Ontario (ONT)

  • US$331
    United AirlinesUnited Airlines
    10:35am - 5:56pm
    Sat Apr 12th 2025
    9h 21m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 343 Depart at 10:35am from Chicago (ORD) Fly for 5h 1m Arrive at 1:36pm in San Francisco (SFO)

    Layover in San Francisco for 2h 49m

    Sat Apr 12th 2025 United Airlines · UA 4783 Depart at 4:25pm from San Francisco (SFO) Fly for 1h 31m Arrive at 5:56pm in Ontario (ONT)

  • US$331
    United AirlinesUnited Airlines
    2:18pm - 9:58pm
    Sat Apr 12th 2025
    9h 40m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 1373 Depart at 2:18pm from Chicago (ORD) Fly for 3h 3m Arrive at 5:21pm in Houston (IAH)

    Layover in Houston for 2h 59m

    Sat Apr 12th 2025 United Airlines · UA 1563 Depart at 8:20pm from Houston (IAH) Fly for 3h 38m Arrive at 9:58pm in Ontario (ONT)

  • US$379
    United AirlinesUnited Airlines
    12:45pm - 8:21pm
    Sat Apr 12th 2025
    9h 36m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 1878 Depart at 12:45pm from Chicago (ORD) Fly for 5h 1m Arrive at 3:46pm in San Francisco (SFO)

    Layover in San Francisco for 3h 9m

    Sat Apr 12th 2025 United Airlines · UA 794 Depart at 6:55pm from San Francisco (SFO) Fly for 1h 26m Arrive at 8:21pm in Ontario (ONT)

  • US$409
    Hawaiian AirlinesHawaiian Airlines
    5:53pm - 11:59pm
    Sat Apr 12th 2025
    8h 6m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 Hawaiian Airlines · HA 6109 Depart at 5:53pm from Chicago (ORD) Fly for 4h 41m Arrive at 8:34pm in Seattle (SEA)

    Layover in Seattle for 0h 49m

    Sat Apr 12th 2025 Hawaiian Airlines · HA 6667 Depart at 9:23pm from Seattle (SEA) Fly for 2h 36m Arrive at 11:59pm in Ontario (ONT)

  • US$506
    Alaska AirlinesAlaska Airlines
    5:53pm - 11:59pm
    Sat Apr 12th 2025
    8h 6m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 Alaska Airlines · AS 335 Depart at 5:53pm from Chicago (ORD) Fly for 4h 41m Arrive at 8:34pm in Seattle (SEA)

    Layover in Seattle for 0h 49m

    Sat Apr 12th 2025 Alaska Airlines · AS 1003 Depart at 9:23pm from Seattle (SEA) Fly for 2h 36m Arrive at 11:59pm in Ontario (ONT)

  • US$535
    United AirlinesUnited Airlines
    3:35pm - 12:15pm
    Sat Apr 12th 2025
    22h 40m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 1863 Depart at 3:35pm from Chicago (ORD) Fly for 4h 59m Arrive at 6:34pm in San Francisco (SFO)

    Layover in San Francisco for 16h 6m

    Sun Apr 13th 2025 United Airlines · UA 5740 Depart at 10:40am from San Francisco (SFO) Fly for 1h 35m Arrive at 12:15pm in Ontario (ONT)

  • US$676
    Alaska AirlinesHawaiian Airlines
    5:53pm - 11:59pm
    Sat Apr 12th 2025
    8h 6m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 Alaska Airlines · AS 335 Depart at 5:53pm from Chicago (ORD) Fly for 4h 41m Arrive at 8:34pm in Seattle (SEA)

    Layover in Seattle for 0h 49m

    Sat Apr 12th 2025 Hawaiian Airlines · HA 6667 Depart at 9:23pm from Seattle (SEA) Fly for 2h 36m Arrive at 11:59pm in Ontario (ONT)

  • US$676
    Alaska AirlinesHawaiian Airlines
    5:53pm - 11:59pm
    Fri Apr 11th 2025
    8h 6m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Fri Apr 11th 2025 Alaska Airlines · AS 335 Depart at 5:53pm from Chicago (ORD) Fly for 4h 41m Arrive at 8:34pm in Seattle (SEA)

    Layover in Seattle for 0h 49m

    Fri Apr 11th 2025 Hawaiian Airlines · HA 6667 Depart at 9:23pm from Seattle (SEA) Fly for 2h 36m Arrive at 11:59pm in Ontario (ONT)

  • US$682
    Hawaiian AirlinesAlaska Airlines
    5:53pm - 11:59pm
    Fri Apr 11th 2025
    8h 6m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Fri Apr 11th 2025 Hawaiian Airlines · HA 6109 Depart at 5:53pm from Chicago (ORD) Fly for 4h 41m Arrive at 8:34pm in Seattle (SEA)

    Layover in Seattle for 0h 49m

    Fri Apr 11th 2025 Alaska Airlines · AS 1003 Depart at 9:23pm from Seattle (SEA) Fly for 2h 36m Arrive at 11:59pm in Ontario (ONT)

  • US$683
    Hawaiian AirlinesAlaska Airlines
    5:53pm - 11:59pm
    Sat Apr 12th 2025
    8h 6m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 Hawaiian Airlines · HA 6109 Depart at 5:53pm from Chicago (ORD) Fly for 4h 41m Arrive at 8:34pm in Seattle (SEA)

    Layover in Seattle for 0h 49m

    Sat Apr 12th 2025 Alaska Airlines · AS 1003 Depart at 9:23pm from Seattle (SEA) Fly for 2h 36m Arrive at 11:59pm in Ontario (ONT)

  • US$691
    United AirlinesHawaiian Airlines
    4:19pm - 11:59pm
    Fri Apr 11th 2025
    9h 40m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Fri Apr 11th 2025 United Airlines · UA 2278 Depart at 4:19pm from Chicago (ORD) Fly for 4h 42m Arrive at 7:01pm in Seattle (SEA)

    Layover in Seattle for 2h 22m

    Fri Apr 11th 2025 Hawaiian Airlines · HA 6667 Depart at 9:23pm from Seattle (SEA) Fly for 2h 36m Arrive at 11:59pm in Ontario (ONT)

  • US$713
    United AirlinesUnited Airlines
    8:45am - 5:56pm
    Sat Apr 12th 2025
    11h 11m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 1387 Depart at 8:45am from Chicago (ORD) Fly for 4h 43m Arrive at 11:28am in San Francisco (SFO)

    Layover in San Francisco for 4h 57m

    Sat Apr 12th 2025 United Airlines · UA 4783 Depart at 4:25pm from San Francisco (SFO) Fly for 1h 31m Arrive at 5:56pm in Ontario (ONT)

  • US$715
    United AirlinesUnited Airlines
    6:25pm - 5:51pm
    Sat Apr 12th 2025
    25h 26m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 2154 Depart at 6:25pm from Chicago (ORD) Fly for 5h 0m Arrive at 9:25pm in San Francisco (SFO)

    Layover in San Francisco for 18h 55m

    Sun Apr 13th 2025 United Airlines · UA 4783 Depart at 4:20pm from San Francisco (SFO) Fly for 1h 31m Arrive at 5:51pm in Ontario (ONT)

  • US$724
    United AirlinesUnited Airlines
    7:52pm - 12:15pm
    Sat Apr 12th 2025
    18h 23m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 1324 Depart at 7:52pm from Chicago (ORD) Fly for 5h 3m Arrive at 10:55pm in San Francisco (SFO)

    Layover in San Francisco for 11h 45m

    Sun Apr 13th 2025 United Airlines · UA 5740 Depart at 10:40am from San Francisco (SFO) Fly for 1h 35m Arrive at 12:15pm in Ontario (ONT)

  • US$775
    Hawaiian AirlinesHawaiian AirlinesHawaiian Airlines
    8:00am - 5:02pm
    Sat Apr 12th 2025
    11h 2m
    Chicago (ORD) → Ontario (ONT)
    2 Stops

    Sat Apr 12th 2025 Hawaiian Airlines · HA 6299 Depart at 8:00am from Chicago (ORD) Fly for 4h 39m Arrive at 10:39am in Seattle (SEA)

    Layover in Seattle for 0h 50m

    Sat Apr 12th 2025 Hawaiian Airlines · HA 6826 Depart at 11:29am from Seattle (SEA) Fly for 0h 56m Arrive at 12:25pm in Portland (PDX)

    Layover in Portland for 2h 20m

    Sat Apr 12th 2025 Hawaiian Airlines · HA 6371 Depart at 2:45pm from Portland (PDX) Fly for 2h 17m Arrive at 5:02pm in Ontario (ONT)

  • US$780
    Alaska AirlinesAlaska AirlinesAlaska Airlines
    8:00am - 5:02pm
    Sat Apr 12th 2025
    11h 2m
    Chicago (ORD) → Ontario (ONT)
    2 Stops

    Sat Apr 12th 2025 Alaska Airlines · AS 587 Depart at 8:00am from Chicago (ORD) Fly for 4h 39m Arrive at 10:39am in Seattle (SEA)

    Layover in Seattle for 0h 50m

    Sat Apr 12th 2025 Alaska Airlines · AS 1039 Depart at 11:29am from Seattle (SEA) Fly for 0h 56m Arrive at 12:25pm in Portland (PDX)

    Layover in Portland for 2h 20m

    Sat Apr 12th 2025 Alaska Airlines · AS 2074 Depart at 2:45pm from Portland (PDX) Fly for 2h 17m Arrive at 5:02pm in Ontario (ONT)

  • US$784
    United AirlinesAlaska Airlines
    7:59pm - 9:28am
    Fri Apr 11th 2025
    15h 29m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Fri Apr 11th 2025 United Airlines · UA 426 Depart at 7:59pm from Chicago (ORD) Fly for 4h 37m Arrive at 10:36pm in Portland (PDX)

    Layover in Portland for 8h 29m

    Sat Apr 12th 2025 Alaska Airlines · AS 3312 Depart at 7:05am from Portland (PDX) Fly for 2h 23m Arrive at 9:28am in Ontario (ONT)

  • US$837
    United AirlinesAlaska Airlines
    4:19pm - 11:59pm
    Sat Apr 12th 2025
    9h 40m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 2278 Depart at 4:19pm from Chicago (ORD) Fly for 4h 42m Arrive at 7:01pm in Seattle (SEA)

    Layover in Seattle for 2h 22m

    Sat Apr 12th 2025 Alaska Airlines · AS 1003 Depart at 9:23pm from Seattle (SEA) Fly for 2h 36m Arrive at 11:59pm in Ontario (ONT)

  • US$850
    United AirlinesUnited Airlines
    9:17pm - 11:05am
    Fri Apr 11th 2025
    15h 48m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Fri Apr 11th 2025 United Airlines · UA 658 Depart at 9:17pm from Chicago (ORD) Fly for 4h 58m Arrive at 12:15am in San Francisco (SFO)

    Layover in San Francisco for 9h 15m

    Sat Apr 12th 2025 United Airlines · UA 5740 Depart at 9:30am from San Francisco (SFO) Fly for 1h 35m Arrive at 11:05am in Ontario (ONT)

  • US$998
    United AirlinesUnited Airlines
    9:27pm - 12:38pm
    Sat Apr 12th 2025
    17h 11m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 490 Depart at 9:27pm from Chicago (ORD) Fly for 2h 55m Arrive at 11:22pm in Denver (DEN)

    Layover in Denver for 11h 53m

    Sun Apr 13th 2025 United Airlines · UA 430 Depart at 11:15am from Denver (DEN) Fly for 2h 23m Arrive at 12:38pm in Ontario (ONT)

  • US$999
    United AirlinesAlaska Airlines
    9:17am - 5:02pm
    Sat Apr 12th 2025
    9h 45m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 1994 Depart at 9:17am from Chicago (ORD) Fly for 4h 35m Arrive at 11:52am in Portland (PDX)

    Layover in Portland for 2h 53m

    Sat Apr 12th 2025 Alaska Airlines · AS 2074 Depart at 2:45pm from Portland (PDX) Fly for 2h 17m Arrive at 5:02pm in Ontario (ONT)

  • US$1051
    United AirlinesUnited Airlines
    9:50pm - 9:58pm
    Sat Apr 12th 2025
    26h 8m
    Chicago (ORD) → Ontario (ONT)
    1 Stop

    Sat Apr 12th 2025 United Airlines · UA 2665 Depart at 9:50pm from Chicago (ORD) Fly for 3h 1m Arrive at 12:51am in Houston (IAH)

    Layover in Houston for 19h 29m

    Sun Apr 13th 2025 United Airlines · UA 1563 Depart at 8:20pm from Houston (IAH) Fly for 3h 38m Arrive at 9:58pm in Ontario (ONT)

@sarahbb1
Sarah Belizaire
@sarahbb1

Have flexible travel plans or looking for alternative routes given the chaos? Check out all the connection possibilities via a super helpful site created by @ismaelyws flightlist.io thanks to @andy_travels for the recommendation #travel #flights

@eyupitsjohn
John Ford
@eyupitsjohn

There seem to be lots of sites launching at the moment that promise to find you cheap flights but not many have the professional finish of Flightlist by @ismaelyws #travel #flights

@oamingsonaa
Roaming Sonaa
@roamingsonaa

For people wanting to maximize their trips, Flightlist is my newest travel hack for uncovering the coolest routes at irresistible prices. No stress, no annoying ads — just seamless flight booking with amazing functionality.

@andy_travels
Andy Travels
@andy_travels

@ismaelyws Just tried out Flightlist for the first time. Really nice idea, well made, and just what I need at the moment 👍

@travelwitbender
Travel With Bender
@travelwitbender

Did you spot my recent article about how to score cheap one way flights? ✈️ FlightList is my new secret tool for discovering cheap routes, within a departure date range. Plus you can also search by country/region for departures & destinations. Powerful! 💪

@travel.with.wes
Wesley Mergard
@travel.with.wes

One useful tool I've found for evaluating different departure and return dates is called FlightList.io. You can quickly scan different travel date ranges, carriers and one way flight options to easily determine the cheapest flight combinations for your trip.

Explore Flight Options

FlightList Blog

Flightlist Interviews 7 Travel Experts On Why They Book One Way Flights
Flightlist Interviews 7 Travel Experts On Why They Book One Way Flights
Why I built FlightList & solved my own problem
Why I Built FlightList & Solved My Own Problem

About FlightList

❝Founded by a remote worker and frequent flyer, who discovered that the best deals come from searching with flexible dates across entire countries or regions. Our streamlined platform strips away the clutter found on typical travel sites, offering a clean interface that focuses solely on finding cost-effective flights. Unlike traditional booking sites, FlightList allows users to search by date ranges and broad destinations, unveiling opportunities that rigid parameters often miss. Our filters let travelers tailor searches to their specific needs, whether they're digital nomads seeking their next adventure or budget-conscious explorers maximizing travel funds. We've made finding cheap flights into a quicker and easier experience, empowering users to discover just how far their budget can take them.❞

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