$211 Cheap JetBlue Airways flights Ontario (ONT) to Nantucket (ACK)

Landing cheap one-way JetBlue Airways flights from ONT to ACK from $211 on Expedia is a breeze — just filter by "Price (lowest to highest)." Or check out our budget-friendly return fares from $520 for your next exciting adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

To find cheap JetBlue Airways fares from Los Angeles - Ontario Intl. Airport (ONT) to Nantucket Memorial Airport (ACK), start searching one to three months before your intended departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the cost. Sunday is generally the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.

To find the earliest departures from ONT to ACK with JetBlue Airways, sort your results by "Morning" and "Early Morning." Choosing an early flight usually means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.