Cheap flights from Baltimore to San Juan from $111

If you’re not able to fly to San Juan in January, then August is your next best option. Flight prices from Baltimore to San Juan during August average around $92.

The cheapest day to depart from Baltimore to San Juan is on a Sunday when prices can be found for as low as $375. The most expensive day to fly to San Juan is Friday, with ticket prices averaging around $451.

The cheapest time of day to fly to San Juan is in the evening when flights can be purchased for as low as $344. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $459 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 $330 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 $278 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.

Frontier and Southwest are the most popular carriers operating from Baltimore/Washington to San Juan

Frontier, Spirit Airlines and United Airlines 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 36% of people opting to fly with this airline when traveling to San Juan. Keep in mind that there are 7 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 27% 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 138 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 22% of their flights experiencing any sort of delay.

1 flights are operational daily from Baltimore to San Juan as of May 2026. The most popular departure time for this route is 7:00PM, with 58% of flights per day taking off in the evening.

The number of flights available between Baltimore and San Juan is 10 per week as of May 2026. The most frequent departure day is Mon, with 20% of weekly flights leaving on this day.