Flights Detroit → Philadelphia
As of September 2026, economy flights from Detroit to Philadelphia have a typical range USD 272–399, median USD 350. Full range across all 190 offers: USD 247–452. We found 59% of 190 offers from budget carriers (around USD 345) and 41% from full-service carriers (around USD 399).
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 → Philadelphia
Based on 190 offers · September 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Detroit → Philadelphia
Add-on pricing from the cheapest available offer per airline · September 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Frontier | — | — | — |
| Southwest | Included | Included | — |
| Southwest | — | USD 90 | — |
| American Airlines | Included | USD 35 | — |
| Delta | Included | USD 35 | — |
| Delta | — | USD 90 | — |
| American | — | USD 110 | — |
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 Philadelphia cost?
Based on 190 offers · September 2026
Detroit to Philadelphia flights ranged from USD 247 to USD 452 across 190 offers analyzed in September 2026. Two fare clusters detected: budget fares around 278 and premium fares around 401 The chart below shows how prices distributed across all 190 offers.
These 190 offers (September 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 278 and USD 399
What hidden fees do Detroit to Philadelphia flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Detroit to Philadelphia routes. The breakdown below is based on 190 offers analyzed in September 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| F9 | 13 | 5% |
| WN | 7 | 2% |
| Southwest | 90 | 33% |
| AA | 47 | 12% |
| DL | 45 | 11% |
| Delta | 90 | 23% |
| American | 110 | 28% |
Southwest: base ~USD 182 + fees USD 90 = ~USD 272 total. Southwest Airlines: base ~USD 338 + fees USD 7 = ~USD 345 total.
Southwest's USD 90 ancillary fees narrow the gap with Southwest Airlines's lower-fee model — the USD 156 base difference shrinks to USD 73 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 Philadelphia?
8 airlines flew Detroit to Philadelphia in this dataset. The route shows a clear split between low-cost and full-service carriers. 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.
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 Southwest | 3 | — | 272 | 90 (33%) |
 Frontier | 12 | — | 278 | n/a |
 Frontier Airlines | 56 | 259–317 | 280 | 13 (5%) |
 Southwest Airlines | 41 | 271–356 | 345 | 7 (2%) |
 American Airlines | 50 | 390–399 | 399 | 47 (12%) |
 Delta Air Lines | 8 | — | 399 | 45 (11%) |
 Delta | 8 | — | 399 | 90 (23%) |
 American | 12 | — | 399 | 110 (28%) |
Where do the best Detroit → Philadelphia 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 Philadelphia flights
- Full-service carriers on Detroit–Philadelphia cost 1.4x more than budget airlines (USD 399 vs USD 294 median; overall median USD 350).
- American charges 16.7x more in ancillary fees than WN — USD 110 vs USD 7 avg per booking.
- The same route priced USD 138 apart depending on where it was booked — the lowest median was USD 261. 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 Philadelphia cost?
- Based on 190 offers analyzed, Detroit to Philadelphia flights range from USD 247 to USD 452, with a median price of USD 350. Search for your specific dates →
- What hidden fees should I expect on Detroit to Philadelphia flights?
- On average, ancillary fees (bags, seat selection) add USD 34 to the base fare on Detroit to Philadelphia flights. See itemized fees for your itinerary →
- Which airline is cheapest on Detroit to Philadelphia including all fees?
- Southwest has the lowest median fare on Detroit to Philadelphia at USD 272 (median across 3 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Detroit–Philadelphia 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 261. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Detroit to Philadelphia routes?
- Detroit to Philadelphia has 8 airlines competing, creating a price range from USD 247 to USD 452 across 190 offers. There are two distinct fare clusters on this route: budget options and premium fares. Find where your trip lands in the distribution →
8 airlines, two price clusters — find which fits your budget
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