HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Juan

$59+ Cheap flights from Detroit (DTT) to San Juan

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — SJU
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Detroit to San Juan with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Detroit All airports to San Juan are usually found in August or September, booked 12 days in advance, depart on a Monday or Tuesday and return on a Thursday

Cheap flight deals from Detroit to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Detroit (DTT) to San Juan (PR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 30, 2025.

Round-trip from

$143
(Cheapflightsfares)

One-way from

$59
(Cheapflightsfares)

Popular in

November

Cheapest in

August

Average price

$317
From Detroit (DTT) to San Juan
Search Deals
One-way flight from Detroit (DTT) to San Juan
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Detroit to San Juan

Cheapest flights from Detroit to San Juan
Explore the most affordable flight options available from Detroit to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/117:00 amDTW - SJU
Nonstop4h 32mSpirit Airlines
Fri 8/224:12 pmSJU - DTW
Nonstop4h 38mSpirit Airlines
Deal found 7/29$143
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/48:40 amDTW - SJU
Nonstop4h 19mDelta
Fri 10/102:05 pmSJU - DTW
Nonstop4h 41mDelta
Deal found 7/29$190
This CheapOair deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/610:49 amDTW - SJU
Nonstop4h 34mMultiple Airlines
Mon 12/1511:05 amSJU - DTW
1 stop7h 18mMultiple Airlines
Deal found 7/28$200

Cheapflights Fare Finder

 
Customize your flight search to find flights from Detroit to San Juan that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 30, 2025.
Use the filters below to find and compare flights from Detroit to San Juan that are best for you.

Fly from

Detroit

Fly to

San Juan

Route

Depart

Return

Price

DetroitSan Juan

DTW - SJU

DTWSJU

Detroit Metropolitan Wayne County

Mon 8/11

7:00 am-11:32 am

Nonstop4h 32m

San Juan Luis Munoz Marin Intl

Fri 8/22

4:12 pm-8:50 pm

Nonstop4h 38m

$143

DetroitSan Juan

DTW - SJU

DTWSJU

Detroit Metropolitan Wayne County

Sat 10/4

8:40 am-12:59 pm

Nonstop4h 19m

San Juan Luis Munoz Marin Intl

Sat 10/11

2:05 pm-6:46 pm

Nonstop4h 41m

$190

DetroitSan Juan

DTW - SJU

DTWSJU

Detroit Metropolitan Wayne County

Mon 8/18

9:40 am-2:17 pm

Nonstop4h 37m

$59

DetroitSan Juan

DTW - SJU

DTWSJU

Detroit Metropolitan Wayne County

Mon 8/18

4:15 pm-11:30 pm

1 stop7h 15m

$100

DetroitSan Juan

DTW - SJU

DTWSJU

Detroit Metropolitan Wayne County

Sat 9/27

8:40 am-12:59 pm

Nonstop4h 19m

$102

DetroitSan Juan

DTW - SJU

DTWSJU

Detroit Metropolitan Wayne County

Sat 10/18

1:08 pm-11:54 pm

2 stops10h 46m

$109

DetroitSan Juan

DTW - SJU

DTWSJU

Detroit Metropolitan Wayne County

Fri 8/29

9:16 am-11:54 pm

1 stop14h 38m

$130

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Best time to book a flight from Detroit to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Detroit with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Detroit to San Juan

How far ahead should I book a flight from Detroit to San Juan?

Use this chart to determine the optimal time to book a round-trip flight from Detroit to San Juan. Price data was last updated on July 25, 2025.

Booking 12 days in advance of your planned departure date is, on average, the best time to get cheap flights from Detroit to San Juan. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Detroit to San Juan?

Currently, September is the cheapest month in which you can book a flight from Detroit to San Juan (average of $254). Flying from Detroit to San Juan in June is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from DTT to SJU?

Find hourly flight availability from Detroit to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 30, 2025.

It’s optimal to fly from Detroit to San Juan in the evening. By choosing this option you can save up to 55% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Detroit to San Juan?

Use this chart to determine the cheapest time to fly round-trip from Detroit to San Juan. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Detroit to San Juan flight should consider departing on Sunday at noon when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Detroit to San Juan

Explore weekly flight availability from Detroit to San Juan. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 30, 2025.

The most flights from DTT to PR1 are scheduled on a Monday (3 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (1 on average).

How much does it cost to fly round-trip from Detroit to San Juan?

Reviews of airlines servicing San Juan

Get insights into the airlines that provide service to San Juan. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Juan. Reviews last updated July 30, 2025.
Read through reviews of airlines operating flights from Detroit to San Juan, such as Southwest, Delta, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,980 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Spirit Airlines
6.3
Okay
8,048 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.9
Fair
3,237 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from Detroit to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Detroit to San Juan?

    Detroit All airports (DTT) is the airport you will fly out of if you book a flight from Detroit to San Juan. You should not have trouble finding flights to San Juan from All airports; the airport handles an average of 2 outbound flights to San Juan per day. You should also have plenty of airline options to choose from since 7 airlines have flights from the Detroit airport to San Juan. It is only a 0.6 mi journey to All airports (DTT) from Detroit’s city center.

  • What are the cheapest airlines flying from Detroit to San Juan round-trip?

    Currently priced at $143, Spirit Airlines will fly you from Detroit to San Juan and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from $190 and $199, respectively. Spirit Airlines is currently priced 60% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Detroit to San Juan one-way?

    One-way options have recently been found by users for as low as $59 on Spirit Airlines. Other airlines that offer cheap prices include Southwest from $100 and Delta from $102 one-way.

  • What are the most reliable airlines from Detroit to San Juan?

    No one likes to see their flight delayed. When booking a flight from Detroit to San Juan consider choosing Spirit Airlines (83%), Delta (82%) or WestJet (82%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Detroit to San Juan?

    On average you can expect to pay $182 for a flight from Detroit to San Juan. The cheapest flight overall is $68 while the most popular route, (Detroit Metropolitan Wayne County - San Juan Luis Munoz Marin Intl) is currently priced at $134.

  • Where are the most common layover locations when flying from Detroit to San Juan?

    The most popular layover on flights from Detroit to San Juan is Orlando.

  • What are some popular things to do or see while on a layover in Orlando?

    Orlando travelers tend to visit Walt Disney World Resort, Universal Orlando Resort, and International Drive more than anywhere else. Walt Disney World Resort, Universal Orlando Resort, and International Drive can be accessed by traveling approximately 16.2 mi, 10.2 mi, and 9.9 mi, respectively from Orlando. Travelers in need of a car in Orlando can rent one for about $35 per day.

  • Where are the least popular layover locations for Detroit to San Juan flights?

    Of the flights from Detroit to San Juan that have layovers, the fewest flights stop in Atlanta.

  • Can I find deals for flights from Detroit to San Juan that include hotel bookings?

    Yes. In addition to deals on Detroit to San Juan flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Detroit to San Juan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Detroit to San Juan.

  • Can I find deals for business class flights from Detroit to San Juan?

    Yes. Cheapflights offers flight deals from Detroit to San Juan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Detroit to San Juan?

    Currently, September is the cheapest month in which you can book a flight from Detroit to San Juan (average of $254). Flying from Detroit to San Juan in June is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 7 airlines flying from Detroit to San Juan

Discover the top 7 airlines that operate flights from Detroit to San Juan. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$124Average$168FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$162Average$269FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$250Average$378FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$284Average$562FlexibilityNo cancel feeOn-time71%
DeltaCheapest$324Average$636FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$396Average$578FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$418Average$614FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.