A
Direct
The human side of flight planning
How hard will this flight feel for you?
Price and duration only tell half the story. Score the sleep loss, jet lag, connections, schedule and exact seat setup before you book.
✓ No sign-up
✓ Runs in your browser
✓ Worldwide airports
AMS → JFK
Example
62
Travel Difficulty
A daytime departure could suit your sleep profile better.
1Your trip
2About you
3Your result
Step 1 of 2
Add your flight plan
Enter the local departure and arrival times shown on your itinerary.
B
Direct
Alternative flight
Your trip details stay on this device.
Step 2 of 2
Build your travel profile
These details explain why the same flight can feel easy to one person and punishing to another.
One number, six human factors
A better way to compare the journey, not just the ticket.
Travel Difficulty combines what is on the itinerary with how you personally respond to it.
Journey Load
Flight hours, total elapsed time, distance and number of segments.
Sleep Disruption
How much travel overlaps your normal sleep and whether you can sleep onboard.
Circadian / Jet Lag
Time-zone shift, travel direction and your past jet lag response.
Connections
Number and length of layovers, plus your connection stress level.
Physical Comfort
Time seated, cabin, seat choice, height and comfort sensitivity.
Schedule Stress
Very early starts, red-eyes and arrivals at biologically awkward hours.
Focused flight calculators
One travel question. One useful answer.
01
Jet Lag Calculator
Estimate the time-zone shift and likely adjustment load for your route.
Calculate jet lag → 02Flight Fatigue Calculator
Score how tiring a flight may feel from its timing, length and seat setup.
Score fatigue → 03Layover Calculator
See whether a connection looks comfortable, pressured or genuinely tight.
Check a layover → 04Red-Eye Flight Calculator
Estimate sleep loss and next-day impact before choosing a night flight.
Check a red-eye →Transparent by design
Useful guidance, without pretending travel is perfectly predictable.
The score is an explainable planning estimate. It uses straight-line distance, the times and airports you enter, local time zones and your quiz answers. It does not claim to predict delays, queues or your health.
0–100Higher means more demanding
Local onlyNo personal data is uploaded
ExplainableEvery result shows its drivers
Read the full methodology and limitations →