Flights Snag one-way fares for as low as $54 during JetBlue’s fall travel flash sale Also, find out about JetBlue's new simplified fare options. BloombergTravelers eyeing fall trips can potentially save money on airfare during a two-day JetBlue sale this week. JetBlue, a leading airline at Logan Airport, launched a 48-hour flash sale on fall flights on Wednesday. Passengers who act fast can snag one-way domestic fares for as low as $54 and one-way transatlantic fares for as low as $299. They then select one of up to three fare options within that experience — base, standard, or flex.