Flights Islip → Raleigh/Durham
As of June 2026, economy flights from Islip to Raleigh/Durham have a typical range USD 300–710, median USD 557. Full range across all 243 offers: USD 138–939. We found 49% of 243 offers from budget carriers (around USD 445) and 51% from full-service carriers (around USD 578).
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 →
Why fly Islip → Raleigh/Durham?
This route offers a range of options, from budget-friendly flights to more premium experiences, connecting travelers between ISP and RDU.
Best for: budget-conscious travelers · travelers seeking premium comfort
Booking tips: To secure a better deal, aim for prices around USD 178 for budget fares or USD 338 for premium options, as these represent the main fare clusters. Be aware that the median price is USD 557, with 75% of offers above USD 331.
Prices for this route exhibit a wide spread, with a bimodal distribution suggesting distinct budget and premium fare options, which is not uncommon for routes with multiple carrier offerings.
AI-generated summary from price distribution data · gemini-2.5-flash-lite
Best offers by airline: Islip → Raleigh/Durham
Based on 243 offers · June 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Islip → Raleigh/Durham
Add-on pricing from the cheapest available offer per airline · June 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Breeze Airways | USD 53 | USD 77 | — |
| Frontier Airlines | — | — | — |
| Southwest | Included | USD 45 | — |
| JetBlue Airways | — | USD 128 | — |
| Cape Air | — | USD 40 | — |
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 Islip to Raleigh/Durham cost?
Based on 243 offers · June 2026
Islip to Raleigh/Durham flights ranged from USD 138 to USD 939 across 243 offers analyzed in June 2026. Two fare clusters detected: budget fares around 178 and premium fares around 338 The chart below shows how prices distributed across all 243 offers.
These 243 offers (June 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 331 and USD 646
What hidden fees do Islip to Raleigh/Durham flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Islip to Raleigh/Durham routes. The breakdown below is based on 243 offers analyzed in June 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| MX | 43 | 10% |
| F9 | 69 | 32% |
| WN | 24 | 7% |
| B6 | 63 | 10% |
| 9K | 31 | 5% |
Frontier Airlines: base ~USD 142 + fees USD 69 = ~USD 211 total. Southwest Airlines: base ~USD 337 + fees USD 24 = ~USD 361 total.
Frontier Airlines's USD 69 ancillary fees narrow the gap with Southwest Airlines's lower-fee model — the USD 195 base difference shrinks to USD 150 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 Islip to Raleigh/Durham?
7 airlines flew Islip to Raleigh/Durham 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.
Even on the cheapest airline (Frontier Airlines), fares ranged USD 191–293 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 Airlines | 12 | 191–293 | 211 | 69 (33%) |
 Southwest Airlines | 10 | 331–564 | 331 | n/a |
 Southwest Airlines | 60 | 311–406 | 361 | 24 (7%) |
 Breeze Airways | 36 | 148–669 | 445 | 43 (10%) |
 B6 | 15 | 471–776 | 578 | 63 (11%) |
 9K | 102 | 541–716 | 633 | 31 (5%) |
 United Airlines | 8 | 624–798 | 792 | n/a |
Where do the best Islip → Raleigh/Durham prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from direct airline 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: Islip to Raleigh/Durham flights
- Full-service carriers on Islip–Raleigh/Durham cost 1.7x more than budget airlines (USD 623 vs USD 370 median; overall median USD 557).
- F9 charges 2.9x more in ancillary fees than WN — USD 69 vs USD 24 avg per booking.
- The same route priced USD 445 apart depending on where it was booked — the lowest median was USD 211. 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 Islip to Raleigh/Durham cost?
- Based on 243 offers analyzed, Islip to Raleigh/Durham flights range from USD 138 to USD 939, with a median price of USD 557. Search for your specific dates →
- What hidden fees should I expect on Islip to Raleigh/Durham flights?
- On average, ancillary fees (bags, seat selection) add USD 36 to the base fare on Islip to Raleigh/Durham flights. See itemized fees for your itinerary →
- Which airline is cheapest on Islip to Raleigh/Durham including all fees?
- Frontier Airlines has the lowest median fare on Islip to Raleigh/Durham at USD 211 (median across 12 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Islip–Raleigh/Durham 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 211. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Islip to Raleigh/Durham routes?
- Islip to Raleigh/Durham has 7 airlines competing, creating a price range from USD 138 to USD 939 across 243 offers. There are two distinct fare clusters on this route: budget options and premium fares. Find where your trip lands in the distribution →
7 airlines, two price clusters — find which fits your budget
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