[Expired] JetBlue’s New Flight Sale Depends on How Cold It Gets — 15% Off If Temps Drop

JetBlue is rolling out a unique, weather-based sale that could unlock discounted flights — but only if temperatures cooperate. Through January 30, the airline will check the forecasted low temperature for New York City and Boston before 10 a.m. ET each day.

If either city is expected to hit 15 degrees or lower, a special promo code offering a discount on flights will be activated for that day.

Let’s break down how this deal works and how you can take advantage if the forecast lines up.

JetBlue’s ‘Warm Up 15’ Sale

JetBlue‘s latest deal is weather-focused. If forecasted lows in New York City or Boston drop to 15 degrees or below, the WARMUP15 promo code activates for that day, unlocking 15% off discounted fares. The savings apply to both cash tickets and award bookings, since point prices follow the cash rate.

You must book by January 30, 2026, at 9:59 a.m. ET to secure this deal, with an eligible travel window through March 11, 2026. However, there are some blackout dates to be aware of and Friday and Sunday travel is excluded from this sale.

Here are the important terms to be aware of:

• Book by January 30, 2026, at 9:59 a.m. EST.
• Travel valid through March 11, 2026.
• Discount applies to base fare, valid on nonstop flights only.
• Flights may be discounted if booked as part of a vacation package, but the other trip elements won’t be discounted.
• Blackout dates apply from February 12 through February 23, 2026.
• Redeemable only on jetblue.com.
• Promo code can be used multiple times

The discount applies to the base fare and is valid on nonstop flights only. Savings can be found on Blue Basic and Blue fares.

Sample Fares

This sale is a little unconventional, since it only kicks in when JetBlue determines forecasted temperatures in New York City or Boston will fall to 15 degrees or lower. But if the code activates, there are real savings to be had — especially if you’re looking to escape the cold.

For example, if you’re trying to trade winter in New York for South Florida sunshine, a $109 flight from New York (JFK) to Fort Lauderdale (FLL) drops to $95 after applying the WARMUP15 promo code.

And because JetBlue’s TrueBlue program is revenue-based, the deal works on award bookings, too. That same flight is priced at just 6,200 TrueBlue points, since point costs follow the discounted cash fare.

Best Ways To Book

To take advantage of the savings, book before 9:59 a.m. ET on January 30, 2026.

If you’re paying cash for these tickets, we recommend paying with a card that rewards you for travel purchases. Here are a few of our favorite cards for JetBlue flyers — all of which offer big welcome bonuses and elevated earnings on flights:

• The JetBlue Plus Card, The JetBlue Business Card, and JetBlue Premier World Elite Mastercard^®: 6x JetBlue points per $1 spent on JetBlue flight purchases
• The JetBlue Card: 3x JetBlue points per $1 spent on JetBlue flight purchases
• Platinum Card^® from American Express: 5x Membership Rewards points per $1 spent on flights booked directly with the airline or through AmexTravel.com (capped at $500,000 spent in purchases per calendar year, then 1x points)
• Citi Strata Premier℠ Card: 3x ThankYou Points on air travel

Alternatively, you can book using TrueBlue points, though you should check the math to see what value you’re getting. We value JetBlue points at 1.3 cents apiece, so work to get something around that value if you’re paying with points for your flight.

Final Thoughts

If you’re flexible and keeping an eye on the forecast, this quirky JetBlue promo could unlock some solid savings. The catch is that the discount only activates on days when temperatures in New York City or Boston are expected to hit 15 degrees or lower, so timing matters.

If the cold lines up and the WARMUP15 promo code goes live, it could be a great chance to book a cheaper winter getaway. Just make sure to book by 9:59 a.m. ET on January 30, 2026. to score the savings.