Flights Detroit → San Juan
As of November 2026, economy flights from Detroit to San Juan have a typical range USD 306–720, median USD 601. Full range across all 247 offers: USD 229–2921. We analyzed 247 offers from 7 airlines in a single price check.
Preview snapshot — prices change. Search for live results.
Data collected by LetsFG's multi-source price checks — every airline and the major booking sites checked for this route. How we collect data →
Best offers by airline: Detroit → San Juan
Based on 247 offers · November 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Detroit → San Juan
Add-on pricing from the cheapest available offer per airline · November 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Frontier Airlines | — | — | — |
| JetBlue | Included | USD 35 | — |
| Southwest | Included | USD 90 | — |
| Delta | Included | USD 35 | — |
| American Airlines | Included | USD 35 | — |
| United | Included | USD 35 | — |
Fees are estimates from the prices we checked and may not reflect your specific itinerary, booking class, or payment method. Run a live search for exact pricing.
How much do flights from Detroit to San Juan cost?
Based on 247 offers · November 2026
Detroit to San Juan flights ranged from USD 229 to USD 2921 across 247 offers analyzed in November 2026. The chart below shows how prices distributed across all 247 offers.
These 247 offers (November 2026) span multiple departure dates and booking windows — your travel dates may fall anywhere in this distribution. Only a live search shows where your specific trip lands.
50% of offers priced between USD 400 and USD 686
What hidden fees do Detroit to San Juan flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Detroit to San Juan routes. The breakdown below is based on 247 offers analyzed in November 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| F9 | 34 | 10% |
| B6 | 27 | 5% |
| WN | 18 | 4% |
| DL | 42 | 4% |
| AA | 46 | 7% |
| UA | 45 | 7% |
Frontier Airlines: base ~USD 327 + fees USD 34 = ~USD 361 total. Southwest Airlines: base ~USD 462 + fees USD 18 = ~USD 480 total.
Frontier Airlines's USD 34 ancillary fees narrow the gap with Southwest Airlines's lower-fee model — the USD 135 base difference shrinks to USD 119 after fees. Always compare total cost, not just the advertised base fare.
Estimates based on median total minus average ancillary fee. Actual base fares vary by itinerary.Fee levels vary significantly across carriers on this route — some carriers charge 50%+ above the base fare in ancillary fees.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Detroit to San Juan?
7 airlines flew Detroit to San Juan in this dataset. Knowing the airline isn't enough — the typical fare range below shows how far prices swing on each one. Median and range include all fees we recorded.
Even on the cheapest airline (Frontier), fares ranged USD 278–317 in this snapshot. Your exact price depends on your dates and how far ahead you book — run a live search to see your number →
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 Frontier | 8 | 278–317 | 303 | n/a |
 Frontier Airlines | 51 | 277–435 | 361 | 34 (9%) |
 B6 | 30 | 280–671 | 476 | 27 (6%) |
 Southwest Airlines | 40 | 480–504 | 480 | 18 (4%) |
 United Airlines | 30 | 653–715 | 673 | 45 (7%) |
 Delta Air Lines | 34 | 558–2037 | 686 | 42 (6%) |
 American Airlines | 54 | — | 686 | 46 (7%) |
Where do the best Detroit → San Juan prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from meta-search sources, but the cheapest channel shifts by route and date — which is exactly why a live search across all of them wins.
We compare every airline and the major booking sites but never disclose which — that's our edge. Prices are the ones we observed and aren't official data from any platform. Run a live search and we bring you the cheapest, wherever it is.
Key facts: Detroit to San Juan flights
- Full-service carriers on Detroit–San Juan cost 1.7x more than budget airlines (USD 682 vs USD 405 median; overall median USD 601).
- AA charges 2.6x more in ancillary fees than WN — USD 46 vs USD 18 avg per booking.
- The same route priced USD 1234 apart depending on where it was booked — the lowest median was USD 278. We search every airline and the major booking sites at once so you always see that lowest price.
Frequently asked questions
- How much does a flight from Detroit to San Juan cost?
- Based on 247 offers analyzed, Detroit to San Juan flights range from USD 229 to USD 2921, with a median price of USD 601. Search for your specific dates →
- What hidden fees should I expect on Detroit to San Juan flights?
- On average, ancillary fees (bags, seat selection) add USD 36 to the base fare on Detroit to San Juan flights. See itemized fees for your itinerary →
- Which airline is cheapest on Detroit to San Juan including all fees?
- Frontier has the lowest median fare on Detroit to San Juan at USD 303 (median across 8 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Detroit–San Juan flights?
- It depends on your dates — no single site is always cheapest. We search every airline and the major booking sites at once (travel agencies and meta-search included) and surface whichever is lowest; the best median in this snapshot was USD 278. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Detroit to San Juan routes?
- Detroit to San Juan has 7 airlines competing, creating a price range from USD 229 to USD 2921 across 247 offers. Prices on this route change with booking timing, advance purchase, and ancillary add-ons. Find where your trip lands in the distribution →
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