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Cheap flight deals from Helena to Sidney Starting at VND 16,640,749

For as little as VND 16,640,749, you can take your next adventure to Sidney without breaking the bank. Choose between one-way and return tickets from Helena below.

  • Round-trip
      • HLN14:05
        29h 35m
        2 stops
        SDY19:40
        Mon, Feb 24|Helena - Sidney|United Airlines
        SDY17:13
        44h 12m
        2 stops
        HLN13:25
        Sun, Mar 2|Sidney - Helena|Cape Air
        VND 16,640,749VND 21,370,455
        22% OFF
        22% OFF
        VND 21,370,455VND 16,640,749

        Choose United Airlines flights from Helena to Sidney. The one-way connecting flight with United Airlines departs from Helena Regional Airport on Mon, Feb 24-Sun, Mar 2, arriving at Sidney-Richland Municipal Airport. One-way Prices start from VND 16,640,749 including taxes and charges.

      • HLN14:05
        23h 49m
        2 stops
        SDY13:54
        Thu, Feb 27|Helena - Sidney|United Airlines
        SDY09:25
        36h 1m
        2 stops
        HLN21:26
        Wed, Mar 5|Sidney - Helena|Cape Air
        VND 16,651,233VND 21,370,455
        22% OFF
        22% OFF
        VND 21,370,455VND 16,651,233

        Choose United Airlines flights from Helena to Sidney. The one-way connecting flight with United Airlines departs from Helena Regional Airport on Thu, Feb 27-Wed, Mar 5, arriving at Sidney-Richland Municipal Airport. One-way Prices start from VND 16,651,233 including taxes and charges.

      • HLN06:45
        12h 55m
        2 stops
        SDY19:40
        Tue, Feb 25|Helena - Sidney|United Airlines
        SDY17:13
        44h 12m
        2 stops
        HLN13:25
        Mon, Mar 3|Sidney - Helena|Cape Air
        VND 16,675,694VND 21,370,455
        22% OFF
        22% OFF
        VND 21,370,455VND 16,675,694

        Choose United Airlines flights from Helena to Sidney. The one-way connecting flight with United Airlines departs from Helena Regional Airport on Tue, Feb 25-Mon, Mar 3, arriving at Sidney-Richland Municipal Airport. One-way Prices start from VND 16,675,694 including taxes and charges.

      • HLN06:45
        12h 55m
        2 stops
        SDY19:40
        Wed, Feb 26|Helena - Sidney|United Airlines
        SDY14:20
        23h 5m
        2 stops
        HLN13:25
        Tue, Mar 4|Sidney - Helena|Cape Air
        VND 16,675,694
        VND 16,675,694

        Choose United Airlines flights from Helena to Sidney. The one-way connecting flight with United Airlines departs from Helena Regional Airport on Wed, Feb 26-Tue, Mar 4, arriving at Sidney-Richland Municipal Airport. One-way Prices start from VND 16,675,694 including taxes and charges.

      • HLN06:45
        12h 55m
        2 stops
        SDY19:40
        Wed, Feb 19|Helena - Sidney|United Airlines
        SDY12:19
        25h 6m
        2 stops
        HLN13:25
        Tue, Feb 25|Sidney - Helena|Cape Air
        VND 16,728,111
        VND 16,728,111

        Choose United Airlines flights from Helena to Sidney. The one-way connecting flight with United Airlines departs from Helena Regional Airport on Wed, Feb 19-Tue, Feb 25, arriving at Sidney-Richland Municipal Airport. One-way Prices start from VND 16,728,111 including taxes and charges.

      • HLN16:19
        16h 39m
        2 stops
        SDY08:58
        Wed, Feb 19|Helena - Sidney|Alaska Airlines
        SDY07:35
        32h 7m
        2 stops
        HLN15:42
        Tue, Feb 25|Sidney - Helena|Cape Air
        VND 16,951,759
        VND 16,951,759

        Choose Alaska Airlines flights from Helena to Sidney. The one-way connecting flight with Alaska Airlines departs from Helena Regional Airport on Wed, Feb 19-Tue, Feb 25, arriving at Sidney-Richland Municipal Airport. One-way Prices start from VND 16,951,759 including taxes and charges.

      • HLN14:25
        47h 29m
        2 stops
        SDY13:54
        Mon, Mar 10|Helena - Sidney|United Airlines
        SDY17:13
        44h 27m
        2 stops
        HLN13:40
        Sun, Mar 16|Sidney - Helena|Cape Air
        VND 17,528,349
        VND 17,528,349

        Choose United Airlines flights from Helena to Sidney. The one-way connecting flight with United Airlines departs from Helena Regional Airport on Mon, Mar 10-Sun, Mar 16, arriving at Sidney-Richland Municipal Airport. One-way Prices start from VND 17,528,349 including taxes and charges.

      • HLN06:30
        50h 28m
        2 stops
        SDY08:58
        Thu, Mar 13|Helena - Sidney|United Airlines
        SDY07:35
        13h 51m
        2 stops
        HLN21:26
        Wed, Mar 19|Sidney - Helena|Cape Air
        VND 17,580,766
        VND 17,580,766

        Choose United Airlines flights from Helena to Sidney. The one-way connecting flight with United Airlines departs from Helena Regional Airport on Thu, Mar 13-Wed, Mar 19, arriving at Sidney-Richland Municipal Airport. One-way Prices start from VND 17,580,766 including taxes and charges.

      • HLN06:30
        13h 10m
        2 stops
        SDY19:40
        Tue, Mar 11|Helena - Sidney|United Airlines
        SDY12:19
        25h 21m
        2 stops
        HLN13:40
        Mon, Mar 17|Sidney - Helena|Cape Air
        VND 17,612,217
        VND 17,612,217

        Choose United Airlines flights from Helena to Sidney. The one-way connecting flight with United Airlines departs from Helena Regional Airport on Tue, Mar 11-Mon, Mar 17, arriving at Sidney-Richland Municipal Airport. One-way Prices start from VND 17,612,217 including taxes and charges.

      • HLN06:30
        26h 28m
        2 stops
        SDY08:58
        Wed, Mar 12|Helena - Sidney|United Airlines
        SDY12:19
        33h 7m
        2 stops
        HLN21:26
        Tue, Mar 18|Sidney - Helena|Cape Air
        VND 17,612,217
        VND 17,612,217

        Choose United Airlines flights from Helena to Sidney. The one-way connecting flight with United Airlines departs from Helena Regional Airport on Wed, Mar 12-Tue, Mar 18, arriving at Sidney-Richland Municipal Airport. One-way Prices start from VND 17,612,217 including taxes and charges.

      • HLN01:00 pm
        3h 5m
        Nonstop
        SDY02:00 pm
        Fri, Feb 21|Helena - Sidney|United Airlines
        Find More Flights
        Find More Flights

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

Helena to Sidney flight time & flight schedules

Flight info.
Departure
Arrival
Weekly Schedule

  1. UA5514

    United Airlines

    06:40

    HLN

    2.0h

    08:43

    DEN

    SMTWTFS
    Search

  2. UA5339

    United Airlines

    08:01

    DEN

    1.6h

    09:39

    BIL

    SMTWTFS

  3. 9K1781

    Cape Air

    12:05

    BIL

    1.8h

    13:54

    SDY

    SMTWTFS

  4. UA5514

    United Airlines

    06:40

    HLN

    2.0h

    08:43

    DEN

    SMTWTFS
    Search

  5. UA5498

    United Airlines

    15:34

    DEN

    1.7h

    17:16

    BIL

    SMTWTFS

  6. 9K1775

    Cape Air

    07:15

    BIL

    1.7h

    08:58

    SDY

    SMTWTFS

  7. UA5514

    United Airlines

    06:40

    HLN

    2.0h

    08:43

    DEN

    SMTWTFS
    Search

  8. UA1884

    United Airlines

    19:25

    DEN

    1.6h

    20:58

    BIL

    SMTWTFS

  9. 9K1775

    Cape Air

    07:15

    BIL

    1.7h

    08:58

    SDY

    SMTWTFS

  10. UA5514

    United Airlines

    06:40

    HLN

    2.0h

    08:43

    DEN

    SMTWTFS
    Search

  11. UA5498

    United Airlines

    15:34

    DEN

    1.7h

    17:16

    BIL

    SMTWTFS

  12. 9K1785

    Cape Air

    17:56

    BIL

    1.7h

    19:40

    SDY

    SMTWTFS

  13. UA5911

    United Airlines

    14:16

    HLN

    2.0h

    16:19

    DEN

    SMTWTFS
    Search

  14. UA703

    United Airlines

    11:45

    DEN

    1.6h

    13:18

    BIL

    SMTWTFS

  15. 9K1785

    Cape Air

    17:56

    BIL

    1.7h

    19:40

    SDY

    SMTWTFS

  16. UA5911

    United Airlines

    14:16

    HLN

    2.0h

    16:19

    DEN

    SMTWTFS
    Search

  17. UA5339

    United Airlines

    08:01

    DEN

    1.6h

    09:39

    BIL

    SMTWTFS

  18. 9K1785

    Cape Air

    17:56

    BIL

    1.7h

    19:40

    SDY

    SMTWTFS

  19. UA5911

    United Airlines

    14:16

    HLN

    2.0h

    16:19

    DEN

    SMTWTFS
    Search

  20. UA703

    United Airlines

    11:45

    DEN

    1.6h

    13:18

    BIL

    SMTWTFS

  21. 9K1789

    Cape Air

    15:00

    BIL

    1.8h

    16:48

    SDY

    SMTWTFS

  22. UA5911

    United Airlines

    14:16

    HLN

    2.0h

    16:19

    DEN

    SMTWTFS
    Search

  23. UA5339

    United Airlines

    08:01

    DEN

    1.6h

    09:39

    BIL

    SMTWTFS

  24. 9K1781

    Cape Air

    12:05

    BIL

    1.8h

    13:54

    SDY

    SMTWTFS

  25. AS2222

    Alaska Airlines

    16:11

    HLN

    1.8h

    16:56

    SEA

    SMTWTFS
    Search

  26. AS2367

    Alaska Airlines

    21:05

    SEA

    1.9h

    23:59

    BIL

    SMTWTFS

  27. 9K1775

    Cape Air

    07:15

    BIL

    1.7h

    08:58

    SDY

    SMTWTFS

  28. AS2322

    Alaska Airlines

    17:00

    HLN

    1.7h

    17:41

    SEA

    ------S
    Search

  29. AS2360

    Alaska Airlines

    09:55

    SEA

    1.9h

    12:49

    BIL

    SMTWTFS

  30. 9K1789

    Cape Air

    15:00

    BIL

    1.8h

    16:48

    SDY

    SMTWTFS
Find more flights and airlines

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

Price trend charts are a great way of tracking how much your flights cost in the lead up to departure and can help you choose when to book your tickets. See how prices to Sidney from Helena have changed and are set to move below.

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 Helena (HLN) to Sidney (SDY) the cheapest?

    Airlines adjust prices for flights from Helena to Sidney based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Helena (HLN) to Sidney (SDY) cost?

    According to Trip.com's data, the lowest price is around VND 19,950,028.

  • How many airports are there in Sidney (SDY)?

    There are 1 airport(s) near Sidney (SDY): Sidney-Richland Municipal Airport.

How to find a cheap flight from Helena to Sidney

If you don’t know some of the key things to look out for when buying flight tickets, prices can often end up sky high or, worse, sold out! We’ve carefully compiled our six most important steps to help ensure you’re getting the best deals when planning your next journey.
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 | Helena to Sidney

Off-season for travelSeptember
Peak season for travelJune
Flight distance601 km
Popular airlineUnited Airlines

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