Cheap flights from Baltimore to San Juan from $128

If you’re not able to fly to San Juan in January, then February is your next best option. Flight prices from Baltimore to San Juan during February average around $289.

The cheapest day to depart from Baltimore to San Juan is on a Sunday when prices can be found for as low as $400. The most expensive day to fly to San Juan is Friday, with ticket prices averaging around $468.

The cheapest time of day to fly to San Juan is in the evening when flights can be purchased for as low as $343. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $473 on average. Flights to San Juan from Baltimore in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Baltimore/Washington to San Juan Luis Munoz Marin Intl for the best Baltimore/Washington - San Juan flight prices

You are more likely to see cheaper flights to San Juan from Baltimore when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan for around $347 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan from Baltimore for as low as $320 on momondo.

There are 4 cabin classes available to choose from on Baltimore to San Juan flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

United Airlines, Southwest, and Delta are the most popular carriers operating from Baltimore/Washington to San Juan

Frontier, United Airlines and JetBlue are the top three most popular airlines that fly to San Juan from Baltimore according to our data. Frontier is the first choice among our users, with 43% of people opting to fly with this airline when traveling to San Juan. Keep in mind that there are 6 different airlines that fly to San Juan on a routine basis, so you have a few additional options to choose from.

Historically, on average around 26% of flights between Baltimore and San Juan have experienced a delay on any given week. The average delay length over the past 12 months has been 137 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Wednesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Monday has historically seen more delays on average compared to the rest of the week.

According to our data, Spirit Airlines have had the least number of delays on this route over the last 12 months; with about 21% of their flights experiencing any sort of delay.

3 flights are operational daily from Baltimore to San Juan as of July 2026. The most popular departure time for this route is 12:00PM, with 57% of flights per day taking off in the afternoon.

The number of flights available between Baltimore and San Juan is 22 per week as of July 2026. The most frequent departure day is Mon, with 18% of weekly flights leaving on this day.