Airport Timezone Converter

Convert local time between any two airports worldwide. Estimates UTC offsets from longitude and shows the time difference.

Airport A

Est. UTC offset:

Airport B

Est. UTC offset:

Local Time at Airport A

Airport A

Airport B

Time Difference

Date Change

International Date Line

This route crosses or approaches the International Date Line (180th meridian). The estimated offset is a rough approximation. Actual timezone offsets near the date line can differ significantly from the longitude-based estimate.

About This Tool

This tool estimates UTC offsets based on airport longitude (15 degrees per hour). Actual timezones can differ from longitude-based estimates due to political boundaries, daylight saving time, and regional conventions. For precise scheduling, always verify with official airline timetables.

Frequently Asked Questions

Does the converter handle daylight saving time?

Yes. The converter uses the IANA timezone database, which includes all historical and current DST transition dates for every timezone. If your selected date falls during a DST change, the offset is adjusted automatically.

What happens when I cross the international date line?

The converter correctly handles crossings of the international date line. For example, flying from Los Angeles (UTC-8) to Tokyo (UTC+9) involves a 17-hour offset. If you depart Monday evening, you may arrive on Wednesday morning local time, even though the flight is only about 11 hours.

Why do some countries have half-hour timezone offsets?

Several countries adopted non-standard offsets for political or geographic reasons. India uses UTC+5:30 to center the timezone over the country's midpoint. Nepal uses UTC+5:45 to differentiate itself from India. The Chatham Islands (New Zealand) use UTC+12:45. Our converter handles all of these correctly.

Methodology

Timezone conversions use the IANA timezone database (tzdata), the same standard used by airlines, operating systems, and scheduling software worldwide. Each airport is mapped to its official IANA timezone identifier (e.g., America/New_York, Asia/Tokyo). The converter first resolves the local time to UTC, then converts to the destination timezone, automatically handling DST transitions and half-hour/quarter-hour offset zones (e.g., India at UTC+5:30, Nepal at UTC+5:45).