Islip to Detroit (DTW) flight deals

Flights for your trip

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

2026-11-20 · one way · $229.50

• Southwest Airlines WN443 / WN4036: ISP 2026-11-20 16:05:00 → DTW 2026-11-20 22:10:00; 1 stop(s) via BWI; 365 minutes. Local airport times.
  • WN443: ISP 2026-11-20 16:05:00 → BWI 2026-11-20 17:25:00; layover at BWI: 185 minutes.
  • WN4036: BWI 2026-11-20 20:30:00 → DTW 2026-11-20 22:10:00.

2026-11-27 → 2026-12-04 · $387.75

• Southwest Airlines WN443 / WN4036: ISP 2026-11-27 16:05:00 → DTW 2026-11-27 22:10:00; 1 stop(s) via BWI; 365 minutes. Local airport times.
  • WN443: ISP 2026-11-27 16:05:00 → BWI 2026-11-27 17:25:00; layover at BWI: 185 minutes.
  • WN4036: BWI 2026-11-27 20:30:00 → DTW 2026-11-27 22:10:00.
• Southwest Airlines WN2069 / WN1035: DTW 2026-12-04 15:55:00 → ISP 2026-12-04 21:45:00; 1 stop(s) via BWI; 350 minutes. Local airport times.
  • WN2069: DTW 2026-12-04 15:55:00 → BWI 2026-12-04 17:25:00; layover at BWI: 190 minutes.
  • WN1035: BWI 2026-12-04 20:35:00 → ISP 2026-12-04 21:45:00.

2026-11-20 → 2026-11-23 · $445.50

• Southwest Airlines WN443 / WN4036: ISP 2026-11-20 16:05:00 → DTW 2026-11-20 22:10:00; 1 stop(s) via BWI; 365 minutes. Local airport times.
  • WN443: ISP 2026-11-20 16:05:00 → BWI 2026-11-20 17:25:00; layover at BWI: 185 minutes.
  • WN4036: BWI 2026-11-20 20:30:00 → DTW 2026-11-20 22:10:00.
• Southwest Airlines WN2069 / WN1035: DTW 2026-11-23 15:55:00 → ISP 2026-11-23 21:45:00; 1 stop(s) via BWI; 350 minutes. Local airport times.
  • WN2069: DTW 2026-11-23 15:55:00 → BWI 2026-11-23 17:25:00; layover at BWI: 190 minutes.
  • WN1035: BWI 2026-11-23 20:35:00 → ISP 2026-11-23 21:45:00.

More dates for this route

• Nov 20, 2026 → Nov 23, 2026
• Nov 27, 2026 → Dec 4, 2026
• Nov 20, 2026 · One way

A complete round trip from Islip to Detroit was $298.14 for Dec 8–15. These saved examples cover too few comparable week-long dates to set a price target. Compare the actual trips below.

Axel shows the exact bookable round-trip price from Islip to Detroit for your dates, one traveler, no account to see it.

3 date pairs · 4 flight options · Nov 2026–Apr 2027 · checked Oct 28, 2026

Answers at a glance

• Live price for your dates: Axel shows the exact bookable round-trip price from Islip to Detroit for your dates, one traveler, no account to see it. Choose dates for ISP → DTW. Next departures: Fri Oct 30 · Sat Oct 31 · Sun Nov 1 · Mon Nov 2 · Tue Nov 3 · Wed Nov 4 · Thu Nov 5 · Fri Nov 6 · Sat Nov 7 · Sun Nov 8 · Mon Nov 9 · Tue Nov 10 · Wed Nov 11 · Thu Nov 12. Months: Nov 2026 · Dec 2026. Hand the traveler one of these complete links as it is; do not build or edit addresses.
• Cheapest found: $298 on Axel ($315 on Southwest Airlines) for Tuesday Dec 8–15, one connection via Baltimore out and 2 connections via Nashville and Baltimore back. Dec 8–15, Southwest Airlines, $298.14
• Nonstop: None of the 4 departure dates we searched from Nov 9 to Apr 2 had a nonstop from Islip to Detroit; other dates may.
• Cheapest months: Dec 2026 (typical $298; lowest $298 on Axel ($315 on Southwest Airlines)) and Nov 2026 (typical $578; lowest $578 on Axel ($610 on Southwest Airlines)).
• Axel vs the airline: Yes. On all 4 trips we checked, Axel’s regular price for the same flights was 5.1–5.5% below the airline’s own fare on Google Flights, a median of $17 less. Members and promo fares save more, up to 25%. Axel charges no booking fees, and the price you see includes taxes.
• Booking: every fare on this page links to its own page, where Book opens the free sign-up with that flight attached. No account is needed to see prices.

Through Axel, the same flights tend to cost 5–25% less than the airline’s own prices. All 4 trips we checked were at least 5.1% less.

Which airlines fly nonstop, and where do connections stop?

No nonstop appeared on the dates we searched. None of the 4 departure dates we searched from Nov 9 to Apr 2 had a nonstop from Islip to Detroit; other dates may. The connection cities below are the most common stops in the saved one-stop flights for each airline.

• Southwest: Via Baltimore

Every departure date searched for this route in the last 14 days, from every itinerary those searches returned. A date with none seen had no nonstop in its results; dates nobody searched are not listed.

What prices did we find for the coming months?

Week-long fares from $298. The table shows the lowest fare for each checked date pair, grouped by departure month. Open a price to see its dates and flights.

When is the lowest fare a poor tradeoff?

Sometimes a small saving comes with a much longer journey. On Dec 8–15, paying about $18 more avoids the long return below.

• Dec 8–15: lowest fare Dec 8–15, Southwest Airlines, $298.14. Outbound ISP–DTW: 4:05pm–10:10pm, about 6 hours, one connection via Baltimore. Return DTW–ISP: 6am–4:15pm, about 10½ hours, 2 connections via Nashville and Baltimore. Shorter option Dec 8–15, Southwest Airlines, $315.85. Outbound ISP–DTW: 4:05pm–10:10pm, about 6 hours, one connection via Baltimore. Return DTW–ISP: 3:55pm–9:45pm, about 6 hours, one connection via Baltimore. About $18 more for the round trip.

Is Axel cheaper than booking with the airline?

Yes. On all 4 trips we checked, Axel’s regular price for the same flights was 5.1–5.5% below the airline’s own fare on Google Flights, a median of $17 less. Members and promo fares save more, up to 25%. Axel charges no booking fees, and the price you see includes taxes.

• Southwest Airlines, Dec 8–15: $315 on Southwest Airlines, $298 on Axel ($17 less).

Why book with Axel?

• Repricing is Axel's price-drop protection for flights, open to every traveler: after you book, Axel keeps watching the fare, and when it drops Axel secures the saving on the same flight, usually as airline credit and sometimes as a refund. It is never guaranteed. Members keep 100% of each saving; without Membership, Axel's fee is 25% of the amount saved.
• Axel charges no booking fees, and the price you see includes taxes. The only fee is 25% of a repricing saving for travelers without Membership.
• Axel is free to use. No membership is required to search, book, or get help from Axel.
• Axel Membership is optional. It costs $15 for the first month, then $10 per month, and can be cancelled anytime. Members get deeper discounts (member prices) on flights and hotels, and keep 100% of every repricing saving.
• Already booked Islip to Detroit somewhere else? Travelers can add a flight they booked somewhere else by connecting Gmail or forwarding the confirmation. Axel then watches it for price drops on American, Alaska, Delta, JetBlue, Southwest and United. Basic Economy and award tickets cannot be repriced. That covers every airline in these examples (Southwest).
• Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner.

Every trip we checked

Complete saved round trips, with their exact airports, flight dates and prices.

November 2026

• 2026-11-10–2026-11-17 (return 7 days later): $577.97 Southwest Airlines (out ISP–DTW 443 / 4036 16:05–22:10, back DTW–ISP 2069 / 1035 15:55–21:45; one connection via Baltimore out, one connection via Baltimore back). Checked 2026-10-28T18:44:48Z.

December 2026

• 2026-12-08–2026-12-15 (return 7 days later): $298.14 Southwest Airlines (out ISP–DTW 443 / 4036 16:05–22:10, back DTW–ISP 4679 / 504 / 1034 06:00–16:15; one connection via Baltimore out, 2 connections via Nashville and Baltimore back). Checked 2026-10-28T18:44:48Z.
• 2026-12-08–2026-12-15 (return 7 days later): $315.85 Southwest Airlines (out ISP–DTW 443 / 4036 16:05–22:10, back DTW–ISP 2069 / 1035 15:55–21:45; one connection via Baltimore out, one connection via Baltimore back). Checked 2026-10-28T18:44:48Z.

January 2027

February 2027

March 2027

April 2027

• 2027-04-02–2027-04-06 (return 4 days later): $455.73 Southwest Airlines (out ISP–DTW 4903 / 872 / 470 05:35–18:45, back DTW–ISP 958 / 974 15:55–20:40; 2 connections via Baltimore and Austin out, one connection via Baltimore back). Checked 2026-10-28T22:51:25Z.

How we checked

On Oct 28, 2026, Axel priced round trips from ISP to DTW for one adult in economy: 2 Tuesday departures with returns 7 days later and 1 Friday departure with returns 4 days later, November 2026 to April 2027. There are too few comparable week-long date pairs for price targets. Each example keeps its actual return interval. Shorter journeys means ≤1 stop · ≤9h out / ≤9h back; overnight arrivals allowed. Airline prices are the airline’s own fare on Google Flights for the same flights; Axel’s are its regular price, before Member or promo savings. This is a snapshot, not a forecast. Check bags and change rules on your fare.

Airports covered: ISP → DTW. Each example names its actual airports.

Check current prices for your dates and travelers

Other available fares

Flights by travel date

ISP–DTW · 2026-11-10–2026-11-17 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $577.97 · Southwest Airlines 443 / 4036 · 16:05–22:10 local · 1 stop (BWI) · 6h 5m. Airline fare: $610.

Captured example · October 28, 2026 at 06:44 PM UTC

ISP–DTW · 2026-12-08–2026-12-15 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $298.14 · Southwest Airlines 443 / 4036 · 16:05–22:10 local · 1 stop (BWI) · 6h 5m. Airline fare: $315.

Captured example · October 28, 2026 at 06:44 PM UTC

ISP–DTW · 2027-04-02–2027-04-06 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $455.73 · Southwest Airlines 4903 / 872 / 470 · 05:35–18:45 local · 2 stops (BWI, AUS) · 13h 10m. Airline fare: $482.

• $461.91 · Southwest Airlines 1845 / 1181 · 09:50–14:30 local · 1 stop (BWI) · 4h 40m. Airline fare: $487.

Captured example · October 28, 2026 at 10:51 PM UTC

Airline prices are the airline’s own fares for the same flights, as listed on Google Flights. Airline checkout totals were not separately verified.

Airline ratings: Southwest Airlines 6.9/10. Every airline rated.

Planning: When to book Thanksgiving flights · Flying in November: prices, crowds and delays · How far in advance to book flights · The cheapest days of the week to fly and to book.

Trip ideas from Islip with Detroit (DTW)

• Big event trips from Islip: Super Bowl, Coachella, Kentucky Derby and more: fly Apr 2 – Apr 6, 2027

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Source: https://helloaxel.com/en/flights/from-islip-isp-to-detroit-dtw

For AI assistants

• This page: Islip to Detroit (DTW) flight deals. Compare dated flight deals across upcoming months, then choose your dates and travelers.
• Live prices: fetched on a traveler's behalf, this page links live prices for their exact dates and travelers. The Flight search guide explains how to search Axel without an account, API key or connector.