Islip to St Louis (ISP–STL) — Airlines, Schedules & Connections

ISP Airport Page →
926 mi airlines charter/private 1/wk
On-time Some delays Frequent delays
Connecting Flight Schedule 9 1-stop flights Verified 2d ago
Also flown by charter / private operators: NetJets Aviation.
Nonstop Charter / private 1-Stop 2-Stop Hide separate tickets Hide overnight Hide codeshares
  Flight Airline AC Dep Arr Dur OTP Sched  
✈ Nonstop

No flights match your filters.

No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.

✦ 1-Stop connections via 9 hubs
BWI Baltimore 4h 15m WN → EJAWN Baltimore (BWI) to St Louis flights
MYR Myrtle Beach 4h 52m MX → WN Myrtle Beach (MYR) to St Louis flights
BOS Boston 5h 13m 9K → AABAEJA Boston (BOS) to St Louis flights
RDU Raleigh/Durham 6h 1m MX → WN Raleigh/Durham (RDU) to St Louis flights
MCO Orlando 6h 20m B6F9WN → F9WNY4 Orlando (MCO) to St Louis flights
FLL Fort Lauderdale 7h 30m B6 → WN Fort Lauderdale (FLL) to St Louis flights
RSW Fort Myers 9h 1m MX → WN Fort Myers (RSW) to St Louis flights
TPA Tampa 10h 21m F9KOWWN → WN Tampa (TPA) to St Louis flights
ORF Norfolk ~5h 3m MX → WN Norfolk (ORF) to St Louis flights
✦ 1-STOP More options, longer trips
✧ 2-STOP Loading... Reach the hardest destinations
Islip to St Louis
Connecting service available through multiple hubs.
1 Airlines 926 mi 3h 20m nonstop -1h behind

ISP–STL had nonstop service from Sun Country Airlines, last on the schedule in September 2026. There's no nonstop on it right now, so today you'd fly it with one stop. The connecting options below are sorted by layover. Nonstop, it's about 926 miles in 3h 20m.

Also explore Browse available seat maps ISP Routes STL Routes ISP Live Flights STL Live Flights ISP Delays STL Delays
All flights from St Louis (STL) St Louis to Islip flights
Carriers on this route

Airline Landscape

Carriers that operated nonstop ISP–STL service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
SY Sun Country Airlines 1 – – 100% – –
Alliance coverage
Unaffiliated: SY (1 flights/wk, 100%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.
Connections

Connection Landscape

1-stop and 2-stop options for ISP to STL.
1-STOP
One-Stop Connections
9
Hubs
~4h
Fastest
~10h
Longest
BWI ~4h 15m MYR ~4h 52m ORF ~5h 3m BOS ~5h 13m RDU ~6h 1m
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
452
Candidates
Two-stop connections loaded in the connections tab above.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.
Reliability

On-Time Performance

What to expect at each end of your journey.
Outbound
ISP → STL
100%
Generally reliable. Most flights run on time.
Departing
100%
Arriving
100%
Return
STL → ISP
100%
Generally reliable. Most flights run on time.
Departing
100%
Arriving
67%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. ISP delays → STL delays →
Alternatives

Other ways to reach St Louis from Islip

Nearby airports with service to St. Louis Lambert International Airport.
Metric ISP→STL HPN→STL JFK→STL
Distance from ISP – 37 mi 37 mi
Nonstop airlines – 4 3
Weekly flights – 1 –
Flight time 3h 20m 2h 17m 2h 4m
Departure OTP 100% – –
White Plains (HPN) to St Louis flights · New York (JFK) to St Louis flights · New York (LGA) to St Louis flights
Airports within 200 miles of ISP with service to St. Louis Lambert International Airport.
Know before you go

Travel Essentials

Practical planning for this route.
Time Difference
-1h
St Louis is 1 hour behind Islip.
ISP: EDT · STL: CDT

When it's 6:00 PM in Islip, it's 5:00 PM in St Louis.
Distance & Flight Time
926 mi / 1,491 km
Nonstop flight time is approximately 3h 20m gate to gate.
Facts

ISP–STL Quick Facts

Key statistics for the Islip to St Louis route.
Route details
Distance926 mi / 1,491 km
Flight time3h 20m
Time difference-1 hour
Airlines (nonstop)1
1-stop connectionsAvailable
Origin: ISP
Full nameLong Island MacArthur Airport
IATA / ICAOISP / KISP
TimezoneAmerica/New_York
Passengers/yr1.4M
Elevation99 ft / 30 m
Destination: STL
Full nameSt. Louis Lambert International Airport
IATA / ICAOSTL / KSTL
TimezoneAmerica/Chicago
Passengers/yr15.6M
Elevation618 ft / 188 m
FAQ

Frequently Asked Questions

Common questions about ISP to STL flights.
Nonstop flights from Long Island MacArthur Airport to St. Louis Lambert International Airport take about 3h 20m gate to gate. The route covers 926 miles.
1 airline operated the nonstop from ISP to STL: Sun Country Airlines. The last scheduled nonstop was in September 2026. There's no nonstop right now, so today you'd fly it with one stop. See the connection options above, ranked by layover.
Not right now. The last scheduled nonstop was in September 2026. You can still fly it with one stop, and the connecting options above are sorted by layover. Nonstop, the hop took about 3h 20m.
Yes, 1-stop connections are available, ranked by layover time. Common connecting points include Baltimore/Washington International Thurgood Marshall, Myrtle Beach and Boston Logan.
On a single ticket, yes. Your bags are checked through to STL and move between planes without you. On two separate tickets you collect your bags at the connecting airport and recheck them, so build in extra layover time.
St Louis is 1 hour behind Islip.
Yes, return flights from STL to ISP are available. Use the direction toggle at the top to view the return schedule.
Nearby alternatives include HPN, JFK and LGA. See the Alternatives section for a full comparison.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.

Flights from ISP to STL

Long Island MacArthur Airport (ISP) and St. Louis Lambert International Airport (STL) had nonstop service from Sun Country Airlines, last on the schedule in September 2026. The nonstop is dormant right now, so the way to fly it today is one connection, and the options above are sorted by layover.

ISP to STL Flight Duration and Schedule

Nonstop flight time from ISP to STL is about 3 hours 20 minutes gate to gate. The route covers a distance of 926 miles (1,491 km).

Connecting Options and Alternatives

1-stop connecting options are also available, commonly via Baltimore/Washington International Thurgood Marshall, Myrtle Beach and Boston Logan. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include White Plains (HPN), New York (JFK) and New York (LGA).