Cheap Flights from Plymouth to Helena from £180

Frequently Asked Questions

FAQs for flights from Plymouth to Helena when there’s no local airport. Departures and arrivals are through Boston to Helena.

• What are the cheapest flights from Boston to Helena (BOS-HLN)?

  Based on Trip.com data, Delta Air Lines offers one-way fares as low as £180 on Cheapest nonstop routes (e.g. BOS to HLN on Sat, Jan 17), while Delta Air Lines offers Cheapest nonstop round-trips from £423 departing on Thu, Dec 18 and returning on Thu, Dec 25.

• When is the best time to book flights from Boston to Helena?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Boston to Helena is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from Boston to Helena?

  To find best deals on flights from Boston to Helena, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sat, Jan 17, with one-way flights priced at just £180.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Delta Air Lines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Helena travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Boston (BOS) to Helena (HLN) the cheapest?

  The cheapest months to fly from Boston to Helena is September, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Boston to Helena on?

  After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Boston to Helena on December 18, 2025 with Delta Air Lines, with prices starting at £422.

• Is there any time difference between Boston and Helena?

  The time difference between Helena and Boston is 2h.

• How do I change or cancel my ticket from Boston to Helena?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.