How long is a cross-country flight from New York to LA?

New York to Los Angeles is approximately 2,451 miles. At a cruising speed of 575 mph, the flight duration is about 4 hours 16 minutes of air time. With typical taxi, departure procedures, and approach, total block time is usually 5–5.5 hours.

What speed do commercial planes fly at cruising altitude?

Commercial jets typically cruise at 550–580 mph (880–935 km/h) at altitudes of 30,000–38,000 feet. Wide-body aircraft like the Boeing 777 and Airbus A350 cruise near the top of that range, while regional jets may fly slightly slower.

How do I calculate flight time from distance?

Divide the great-circle distance by the aircraft's average cruising speed: Flight Time = Distance ÷ Speed. For example, 2,451 miles ÷ 575 mph = 4.26 hours (4 hours 16 minutes). Add 30–60 minutes for taxi, departure, and arrival procedures.

Why is actual flight time longer than the calculated air time?

Taxiing to and from the runway, ATC routing deviations, climb and descent phases, and holding patterns all add time beyond the pure cruising-distance calculation. Airlines typically pad schedules by 30–60 minutes, which is why on-time arrivals often land early.

How long is the longest non-stop commercial flight?

Singapore Airlines Flight SQ22 (Singapore to New York JFK) covers approximately 9,534 miles and takes about 18–19 hours, making it the world's longest non-stop commercial flight. The return leg averages about 18.5 hours.

Does wind affect flight time?

Yes significantly. A 100 mph jet stream tailwind effectively adds 100 mph to ground speed, reducing flight time by 15–25% on long routes. Headwinds do the opposite. Transatlantic westbound flights (London→NY) are consistently longer than eastbound (NY→London) because of prevailing jet streams.

How long is the flight from New York to London?

The great-circle distance from JFK to London Heathrow is approximately 3,459 miles. At 575 mph cruise speed, air time is about 6 hours. Eastbound flights (New York to London) ride the prevailing westerly jet stream as a tailwind, pushing ground speeds to 650–700+ mph and shortening the trip to around 7 hours block time. Westbound (London to New York) flies against the jet stream, typically running 8–9 hours. Airlines pad schedules by 30–60 minutes over the calculated air time.

When should I arrive at the airport before a flight?

For domestic flights in the US, the TSA recommends arriving at least 2 hours before departure; 90 minutes is the practical minimum if you have no checked bags and use TSA PreCheck. For international flights, plan for 3 hours minimum — customs and immigration queuing, additional security screening, and larger terminals all require more buffer. During peak travel days (Thanksgiving, Christmas, July 4th), add 30–60 minutes to these minimums.

How fast do commercial planes fly?

Most commercial jet aircraft cruise at 550–590 mph (880–950 km/h) at altitudes between 30,000 and 38,000 feet. The Boeing 737 and Airbus A320, the most common short-haul jets, cruise at around 560–575 mph. Long-haul wide-bodies like the Boeing 787 and Airbus A350 cruise at the top of that range, about 580–590 mph. Ground speed (what a GPS records) varies from these figures based on wind.

Flight Time Calculator — Estimate Trip Duration

How to Use This Flight Time Calculator

The flight time calculator on this page estimates trip duration from route distance and cruising speed. Select a preset route or choose “Custom” and enter the distance manually. Adjust the cruising speed if needed — the default is 575 mph, typical for a Boeing 737 or Airbus A320. Optionally add layover or delay time to get total trip duration.

For multi-leg trips, calculate each leg separately and add the results. For general travel time planning, use our time duration calculator to add up departure and arrival times across time zones.

How to Calculate Flight Time

Flight time is calculated using the same speed-distance-time formula used for any vehicle:

Flight Time (hours) = Distance (miles) ÷ Cruising Speed (mph)

For example, New York to Los Angeles is 2,451 miles. At 575 mph: 2,451 ÷ 575 = 4.26 hours = 4 hours 16 minutes of air time. Airlines add buffer time for taxi, departure routing, and approach, so the scheduled “block time” will be 30–60 minutes longer.

Great-Circle Distance vs. Actual Route

The straight-line (great-circle) distance between airports is the shortest possible route over a sphere. Actual flights deviate due to ATC routes, weather avoidance, airspace restrictions, and jet stream routing. Expect actual flown distance to be 2–8% more than the great-circle figure.

AdvertisementResponsive Ad

Common Flight Routes and Duration

Here are typical flight durations for popular US and international routes at 575 mph:

New York → Los Angeles (2,451 mi): ~4h 16m air time
New York → London (3,459 mi): ~6h 1m air time (eastbound with tailwind is faster)
Los Angeles → Tokyo (5,478 mi): ~9h 32m air time
Chicago → Miami (1,197 mi): ~2h 5m air time
Dallas → Seattle (1,680 mi): ~2h 55m air time

Commercial Aircraft Cruising Speeds

Different aircraft types cruise at different speeds. Here are typical values at cruise altitude:

Boeing 737-800 / Airbus A320: 560–575 mph (900–925 km/h)
Boeing 777 / Airbus A330: 560–590 mph (900–950 km/h)
Boeing 787 Dreamliner: 585 mph (942 km/h)
Airbus A350: 580 mph (934 km/h)
Airbus A380: 560 mph (900 km/h)
Concorde (retired): 1,354 mph (2,180 km/h) — Mach 2.04

AdvertisementResponsive Ad

How Wind Affects Flight Time

Jet streams — fast-moving air currents at high altitude — significantly affect flight duration. Westbound transatlantic flights (London to New York) fly against the prevailing westerly jet stream, adding 1–2 hours compared to the eastbound return. Pilots and airlines plan routes to use tailwinds and avoid headwinds where possible.

A 100 mph tailwind on a 3,000-mile flight at 575 mph ground speed saves approximately 38 minutes. This is why flight tracking apps sometimes show airlines arriving early — they caught a favorable jet stream.

Tips for Accurate Estimates

Use scheduled block time from airline websites for trip planning — it already includes padding
Add 30 minutes for domestic departures, 60 minutes for international connections
Our speed distance time calculator can handle any vehicle or transport mode

Jet Lag and Time Zones

Flight time tells you how long you are in the air, but the total disruption of long-haul travel includes jet lag — the misalignment of your body clock with the destination time zone. A general rule of thumb is one day of recovery for each time zone crossed. Flying from New York to London (5 time zones) typically requires 4–5 days to fully adjust. Eastward travel (shorter subjective days) tends to produce more severe jet lag than westward travel (longer days).

Strategies to minimize jet lag: shift your sleep schedule 1–2 days before departure, avoid alcohol and caffeine on long flights, expose yourself to local daylight immediately upon arrival, and stay awake until local bedtime even if exhausted on day one. Melatonin (0.5–1 mg taken at local bedtime) has solid evidence for helping circadian rhythm realignment.

Sources & References

FAA Aeronautical Information Manual — Federal Aviation Administration
Aircraft Characteristics — Boeing — Boeing

Flight Time Calculator

Route

Flight Parameters

Results