[Expired] [Deal Alert] East Coast Cities to Puerto Rico From $97 Round-trip

Updated: September 20, 2025, 8:32am CDT

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Fare Deal — Details
Best Ways To Book
Final Thoughts

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Update:The offer mentioned below has expired and is no longer available.

This is not a drill.

If you’re after a cheap last-minute getaway this summer and you don’t mind flying low-cost carriers, then these round-trip fares to San Juan, Puerto Rico (SJU) starting at just $97 might be just what you needed.

Let’s take a look at what you need to know.

Fare Deal — Details

It really doesn’t get much better than sub-$100 round-trip fares to the Caribbean, and low-cost carriers Frontier Airlines and Spirit Airlines are making that all possible with their latest deals.

You’ll find deals from cities up and down the East Coast including major airports like Baltimore (BWI), Boston (BOS), Newark (EWR), and Philadelphia (PHL).

What makes these super-low round-trip fares even more appealing is that they’re available in August, before the end of the summer.

Class: Economy
Routes: Baltimore (BWI), Boston (BOS), Newark (EWR), and Philadelphia (PHL)
Dates: August through September 2023
Rates: From $97 to $139 round-trip

Hot Tip:

Remember, Frontier and Spirit’s lowest fares never include a checked bag. Take a look at Frontier’s baggage policies and Spirit’s baggage policies before booking so you know what you’re signing up for before you head to the airport.

The cheapest fare you’ll find departs from Baltimore and you can score it for under $100 round-trip:

Baltimore to San Juan from just $97 round-trip. Image Credit: Frontier

If you’re based in the New York City area, Spirit has you covered with this $99 round-trip fare from Newark to San Juan:

Newark to San Juan in September — Newark to San Juan with Spirit from just $99 round-trip. Image Credit: Google Flights

And if you live in Philly, you can fly round-trip for just a little bit over $100:

Philadelphia to San Juan — Philly to San Juan with Frontier from just $109 round-trip this August. Image Credit: Frontier

Bostonians can also enjoy the Puerto Rican sun on the cheap, but for a slightly higher cost at $139 round-trip:

Boston to San Juan in August — Fly from Boston to San Juan this August from $139 round-trip. Image Credit: Google Flights

Best Ways To Book

If you’re interested in any of these flights, we’d advise using a card that rewards you for travel purchases such as the Platinum Card^® from American Express which would earn you 5x Membership Rewards points for flights booked directly with airlines or with AmexTravel.com up to $500,000 on these purchases per calendar year (then 1x).

More specifically for Frontier Airlines bookings, you might want to consider Frontier Airlines World Mastercard^® which would earn you 5x miles on Frontier Airlines flights through frontier.com. That’s not to mention the other benefits that come with the card.

Final Thoughts

Let’s be real for a second: it would be hard for even the most luxury-loving, business-class flying sunseeker to turn their nose up at fares this low.

See you in Puerto Rico!