How far is my flight actually going to be?
A straight line on a map rarely matches what the plane flies. Airlines route around restricted airspace, jet streams, and refueling needs, so the great-circle distance between two cities is a starting point, not the final answer. Knowing the real distance still matters: it tells you roughly how many hours you will spend in the air, how much fuel range the aircraft needs (which affects which planes can fly the route nonstop), and whether a layover is likely.
| Route | Great-circle distance | Typical flight time |
|---|---|---|
| New York to London | 5,570 km | 7h |
| Los Angeles to Tokyo | 8,800 km | 11h |
| Chicago to Sao Paulo | 8,300 km | 10h |
| Miami to Buenos Aires | 7,000 km | 9h |
What should actually be in my suitcase for this specific trip?
Packing lists that ignore climate, trip length, and destination culture lead to either an overweight bag or a missing rain jacket at the worst moment. The variables that should shape your list are: season at the destination (not at home), number of days, activities planned (business meetings, hiking, beach), and any dress-code norms at your destination. A trip to Reykjavik in October needs thermal layers and a rain shell; the same length trip to Bangkok needs light, breathable fabric and modest clothing for temple visits.
- Check the destination's forecast for your actual travel dates, not the seasonal average
- Separate carry-on essentials (medication, chargers, one change of clothes) from checked items
- Leave 10 to 15 percent of bag space free for anything bought on the trip
Will my chargers and appliances even work at my destination?
This is the checklist item people skip until they land with a dead phone. Two separate things can go wrong: the plug shape (does it physically fit the socket) and the voltage (does the appliance accept the local electrical current). Most modern phone and laptop chargers are dual-voltage (100-240V) and only need a plug adapter, but hair dryers, straighteners, and some older electronics are often single-voltage and need an actual converter, not just an adapter.
| Region | Plug type(s) | Standard voltage |
|---|---|---|
| United States, Canada | A, B | 120V |
| United Kingdom, Ireland | G | 230V |
| Continental Europe | C, E, F | 230V |
| Japan | A, B | 100V |
| Australia, New Zealand | I | 230V |
How many days will it take me to adjust to the new time zone?
Jet lag severity depends on how many time zones you cross and which direction you fly. Eastward travel (for example, New York to Paris) is generally harder on the body than westward travel (Paris to New York), because it asks your body clock to shorten its day rather than lengthen it. A rough rule of thumb is about one day of adjustment per time zone crossed, though this varies by person, sleep habits, and whether you can get sunlight exposure at the right times after landing.
- Shift your sleep schedule by 30 to 60 minutes per day in the days before departure, if the trip allows it
- Seek daylight in the morning after an eastward flight, and in the evening after a westward flight
- Avoid heavy alcohol and long naps on the day you land
Plug in your route and travel dates to get a personalized adjustment estimate instead of guessing.
Putting it together before you fly
A smooth international trip usually comes down to four checks done in advance: knowing the real flight distance and likely duration, packing for the actual weather and activities at your destination, confirming your electronics will work once you land, and giving your body a realistic plan to recover from the time change. None of these take more than a few minutes to check, and doing them ahead of time avoids the two most common travel headaches: dead batteries and three days of exhaustion.