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Cheap flight deals from Ontario to Sidney Starting at €187

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

  • One way
  • Round-trip
      • ONT06:00 am
        6h 54m
        2 stops
        SDY01:54 pm
        Sat, Mar 29|Ontario - Sidney|Delta Air Lines
        €187€305
        39% OFF
        39% OFF
        €305€187

        Choose Delta Air Lines flights from Ontario to Sidney. The one-way connecting flight with Delta Air Lines departs from Ontario International Airport on Sat, Mar 29, arriving at Sidney-Richland Municipal Airport. One-way Prices start from €187 including taxes and charges.

      • ONT07:00 am
        24h 58m
        2 stops
        SDY08:58 am
        Wed, Feb 26|Ontario - Sidney|Alaska Airlines
        €196€305
        36% OFF
        36% OFF
        €305€196

        Choose Alaska Airlines flights from Ontario to Sidney. The one-way connecting flight with Alaska Airlines departs from Ontario International Airport on Wed, Feb 26, arriving at Sidney-Richland Municipal Airport. One-way Prices start from €196 including taxes and charges.

      • ONT06:00 am
        6h 54m
        2 stops
        SDY01:54 pm
        Wed, Feb 26|Ontario - Sidney|Delta Air Lines
        €199€305
        35% OFF
        35% OFF
        €305€199

        Choose Delta Air Lines flights from Ontario to Sidney. The one-way connecting flight with Delta Air Lines departs from Ontario International Airport on Wed, Feb 26, arriving at Sidney-Richland Municipal Airport. One-way Prices start from €199 including taxes and charges.

      • ONT05:05 am
        10h 43m
        2 stops
        SDY04:48 pm
        Wed, Feb 26|Ontario - Sidney|United Airlines
        €201
        €201

        Choose United Airlines flights from Ontario to Sidney. The one-way connecting flight with United Airlines departs from Ontario International Airport on Wed, Feb 26, arriving at Sidney-Richland Municipal Airport. One-way Prices start from €201 including taxes and charges.

      • ONT06:00 am
        6h 54m
        2 stops
        SDY01:54 pm
        Fri, Mar 14|Ontario - Sidney|Delta Air Lines
        €208
        €208

        Choose Delta Air Lines flights from Ontario to Sidney. The one-way connecting flight with Delta Air Lines departs from Ontario International Airport on Fri, Mar 14, arriving at Sidney-Richland Municipal Airport. One-way Prices start from €208 including taxes and charges.

      • ONT06:00 am
        6h 54m
        2 stops
        SDY01:54 pm
        Thu, Apr 10|Ontario - Sidney|Delta Air Lines
        €218
        €218

        Choose Delta Air Lines flights from Ontario to Sidney. The one-way connecting flight with Delta Air Lines departs from Ontario International Airport on Thu, Apr 10, arriving at Sidney-Richland Municipal Airport. One-way Prices start from €218 including taxes and charges.

      • ONT05:00 am
        10h 48m
        2 stops
        SDY04:48 pm
        Tue, Apr 1|Ontario - Sidney|United Airlines
        €223
        €223

        Choose United Airlines flights from Ontario to Sidney. The one-way connecting flight with United Airlines departs from Ontario International Airport on Tue, Apr 1, arriving at Sidney-Richland Municipal Airport. One-way Prices start from €223 including taxes and charges.

      • ONT10:57 am
        21h 1m
        2 stops
        SDY08:58 am
        Tue, Apr 1|Ontario - Sidney|American Airlines
        €224
        €224

        Choose American Airlines flights from Ontario to Sidney. The one-way connecting flight with American Airlines departs from Ontario International Airport on Tue, Apr 1, arriving at Sidney-Richland Municipal Airport. One-way Prices start from €224 including taxes and charges.

      • ONT05:05 am
        10h 43m
        2 stops
        SDY04:48 pm
        Thu, Feb 27|Ontario - Sidney|United Airlines
        €225
        €225

        Choose United Airlines flights from Ontario to Sidney. The one-way connecting flight with United Airlines departs from Ontario International Airport on Thu, Feb 27, arriving at Sidney-Richland Municipal Airport. One-way Prices start from €225 including taxes and charges.

      • ONT05:15 pm
        14h 43m
        2 stops
        SDY08:58 am
        Tue, Apr 1|Ontario - Sidney|Delta Air Lines
        €228
        €228

        Choose Delta Air Lines flights from Ontario to Sidney. The one-way connecting flight with Delta Air Lines departs from Ontario International Airport on Tue, Apr 1, arriving at Sidney-Richland Municipal Airport. One-way Prices start from €228 including taxes and charges.

      • ONT01:00 pm
        3h 5m
        Nonstop
        SDY02:00 pm
        Wed, Feb 26|Ontario - Sidney|Delta Air Lines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Los Angeles to Sidney Flight Time

Flight info.
Departure
Arrival
Weekly Schedule

  1. AA3862

    American Airlines

    04:25 pm

    ONT

    1.4h

    06:47 pm

    PHX

    SMTWTFS
    Search

  2. AA3539

    American Airlines

    07:50 pm

    PHX

    1.5h

    10:18 pm

    BIL

    SMTWTFS

  3. 9K1775

    Cape Air

    07:15 am

    BIL

    1.7h

    08:58 am

    SDY

    SMTWTFS

  4. UA1575

    United Airlines

    05:05 am

    ONT

    2.3h

    08:24 am

    DEN

    SMTWTFS
    Search

  5. UA703

    United Airlines

    11:45 am

    DEN

    1.6h

    01:18 pm

    BIL

    SMTWTFS

  6. 9K1785

    Cape Air

    05:56 pm

    BIL

    1.7h

    07:40 pm

    SDY

    SMTWTFS

  7. UA1575

    United Airlines

    05:05 am

    ONT

    2.3h

    08:24 am

    DEN

    SMTWTFS
    Search

  8. UA703

    United Airlines

    11:45 am

    DEN

    1.6h

    01:18 pm

    BIL

    SMTWTFS

  9. 9K1789

    Cape Air

    03:00 pm

    BIL

    1.8h

    04:48 pm

    SDY

    SMTWTFS

  10. DL3933

    Delta Air Lines

    05:10 pm

    ONT

    1.9h

    08:03 pm

    SLC

    SMTWTFS
    Search

  11. DL1724

    Delta Air Lines

    10:55 pm

    SLC

    1.4h

    12:16 am

    BIL

    SMTWTFS

  12. 9K1775

    Cape Air

    07:15 am

    BIL

    1.7h

    08:58 am

    SDY

    SMTWTFS

  13. DL1340

    Delta Air Lines

    06:00 am

    ONT

    1.8h

    08:50 am

    SLC

    SMTWTFS
    Search

  14. DL4038

    Delta Air Lines

    09:30 am

    SLC

    1.5h

    11:00 am

    BIL

    SMTWTFS

  15. 9K1789

    Cape Air

    03:00 pm

    BIL

    1.8h

    04:48 pm

    SDY

    SMTWTFS

  16. AS1091

    Alaska Airlines

    06:00 am

    ONT

    2.7h

    08:42 am

    SEA

    SMTWTFS
    Search

  17. AS2360

    Alaska Airlines

    12:13 pm

    SEA

    1.9h

    03:05 pm

    BIL

    SMTWT-S

  18. 9K1789

    Cape Air

    03:00 pm

    BIL

    1.8h

    04:48 pm

    SDY

    SMTWTFS

  19. DL1340

    Delta Air Lines

    06:00 am

    ONT

    1.8h

    08:50 am

    SLC

    SMTWTFS
    Search

  20. DL4038

    Delta Air Lines

    09:30 am

    SLC

    1.5h

    11:00 am

    BIL

    SMTWTFS

  21. 9K1781

    Cape Air

    12:05 pm

    BIL

    1.8h

    01:54 pm

    SDY

    SMTWTFS

  22. AS1058

    Alaska Airlines

    06:55 am

    ONT

    2.4h

    09:19 am

    PDX

    S-TWT-S
    Search

  23. AS2161

    Alaska Airlines

    10:30 am

    PDX

    1.8h

    01:17 pm

    BIL

    SMTWTFS

  24. 9K1785

    Cape Air

    05:56 pm

    BIL

    1.7h

    07:40 pm

    SDY

    SMTWTFS

  25. AS1058

    Alaska Airlines

    06:55 am

    ONT

    2.4h

    09:19 am

    PDX

    S-TWT-S
    Search

  26. AS2161

    Alaska Airlines

    10:30 am

    PDX

    1.8h

    01:17 pm

    BIL

    SMTWTFS

  27. 9K1789

    Cape Air

    03:00 pm

    BIL

    1.8h

    04:48 pm

    SDY

    SMTWTFS

  28. F91500

    Frontier Airlines

    12:59 am

    ONT

    2.3h

    04:17 am

    DEN

    SMTWTFS
    Search

  29. UA5339

    United Airlines

    08:01 am

    DEN

    1.6h

    09:39 am

    BIL

    SMTWTFS

  30. 9K1781

    Cape Air

    12:05 pm

    BIL

    1.8h

    01:54 pm

    SDY

    SMTWTFS
Find more flights and airlines

When is the cheapest time to fly from Ontario to Sidney?

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from Ontario (ONT) to Sidney (SDY) the cheapest?

    Airlines adjust prices for flights from Ontario to Sidney based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Ontario (ONT) to Sidney (SDY) cost?

    According to Trip.com's data, the lowest price is around €463.

How to find a cheap flight from Ontario to Sidney

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Ontario to Sidney. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Info | Ontario to Sidney

Flight distance11,063.83 km
Popular airlineAlaska Airlines

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