Flight time & jet lag: Newark to Buenos Aires
Newark (EWR) → Buenos Aires (EZE) · 8,548 km (5,311 mi) · long haul · north america south america
The flight from Newark (EWR) to Buenos Aires (EZE) takes 10h 00m to 11h 15m covering 8,548 km. Buenos Aires is 2 hours ahead of Newark, making this a light-severity jet lag route traveling east. Full circadian adjustment typically takes 2 days.
- Route:
- Newark (EWR) → Buenos Aires (EZE)
- Distance:
- 8,548 km (5,311 mi)
- Flight time:
- 10h 00m to 11h 15m gate-to-gate
- Time difference:
- +2 hours
- Jet lag severity:
- light (2 zones crossed)
- Recovery time:
- ~2 days
- Direction:
- eastbound
- Route type:
- long-haul, north america south america
- Origin timezone:
- America/New_York
- Destination timezone:
- America/Argentina/Buenos_Aires
Newark to Buenos Aires: Route overview
This long-haul route from Newark (EWR) to Buenos Aires (EZE) covers 8,548 km in approximately 10h 00m to 11h 15m, crossing 2 time zones eastbound. With only a 2-hour time difference, most travelers adjust within a day, though the long-haul journey may still cause travel fatigue. Additionally, this route crosses the equator, meaning seasons are reversed — if departing in winter, you arrive in summer conditions, which affects both your wardrobe planning and daylight exposure patterns for jet lag recovery.
What makes the Newark–Buenos Aires route different
With only 2 hours of time difference, this route sits at the threshold where jet lag is barely noticeable for most travelers. The bigger factor is likely the 10h 00m to 11h 15m flight duration itself and any associated sleep deprivation.
Arrival strategy for Buenos Aires
Arriving in Buenos Aires after a 2-hour eastward shift, your body will think it is 2 hours earlier than the local clock shows. If you arrive in the morning, push through fatigue and get outside in bright daylight. If you arrive in the evening, eat a light meal and go to bed at the local time — you may wake early, but resist getting up until at least 05:00.
Circadian rhythm analysis: Newark → Buenos Aires
When you arrive in Buenos Aires, your circadian rhythm is still running on Newark time. At 09:00 Buenos Aires time, your body clock reads 07:00 — early morning on your body clock. You will feel groggy but functional, with energy building through the local morning. By 22:00 local time (when you should sleep), your body reads 20:00 — approaching your natural evening. Sleep onset should be achievable with proper wind-down routine. Your circadian system adjusts at roughly 1 hour per day, so expect 2 days for full alignment.
Your body clock in Buenos Aires (day 1)
How your body clock maps to local time upon arrival, before any adjustment.
| Buenos Aires Time | Your Body Clock (Newark) | How You Feel | Recommendation |
|---|---|---|---|
| 06:00 | 04:00 | Early wake phase. Groggy, low energy. | Light physical activity helps. Coffee is acceptable if 8+ hours before target bedtime. |
| 09:00 | 07:00 | Morning alertness building. Moderate energy. | Good window for bright light exposure if adjusting eastward. |
| 12:00 | 10:00 | Peak morning alertness on body time. | Productive window. Use this energy for important tasks. |
| 15:00 | 13:00 | Post-lunch dip. Moderate energy. | Brief 20-min nap acceptable if severely fatigued. Avoid long naps. |
| 18:00 | 16:00 | Afternoon alertness on body time. | Good window for light exposure if adjusting westward. |
| 21:00 | 19:00 | Evening wind-down. Melatonin starting to rise. | Dim lights and avoid screens if you need to stay awake longer. |
| 00:00 | 22:00 | Natural sleep window on body time. | Ideal time to sleep if it aligns with local night. If not, use bright light to delay. |
| 03:00 | 01:00 | Deep sleep phase. Intense drowsiness likely. | If awake, use bright light to push clock forward. Avoid driving or complex tasks. |
Pre-departure preparation
To prepare for this 2-hour eastward shift to Buenos Aires, begin adjusting 2 days before departure. Each night, move your bedtime 60 minutes earlier and wake correspondingly earlier. Seek bright light immediately upon waking. On departure day, set your watch to Buenos Aires time and begin eating meals on that schedule. This pre-adjustment can reduce your recovery time by 1–2 days.
Your first 72 hours in Buenos Aires
Day 1 in Buenos Aires: Your body is ~2 hours off local time. Get bright sunlight in the morning. Avoid napping past 14:00. Eat at local mealtimes even if not hungry. Caffeine is fine before 14:00, not after. Day 2: ~1 hours off. Continue morning (07:00–10:00) light exposure. Sleep quality should improve. Day 3: ~0 hours off. You should feel mostly adjusted. Return to normal activities.
Recovery timeline
Full circadian adjustment for the Newark → Buenos Aires route typically takes 2 days, based on the body's natural adaptation rate of ~1 hour per day for eastbound travel. During this period, expect gradually improving sleep quality, with the most noticeable symptoms (fatigue, difficulty concentrating, appetite changes) during the first 2 days. By day 2, most travelers report feeling fully synchronized with Buenos Aires's schedule.
Route Planner
Adjust departure date for DST-accurate results.
Business hours: Newark vs Buenos Aires
Newark and Buenos Aires share 7 overlapping business hours, providing a reasonable window for scheduling calls and meetings. The most productive overlap falls between 09:00 and 15:00 in Newark (11:00–17:00 in Buenos Aires).
| Newark | Buenos Aires |
|---|---|
| 09:00 | 11:00 |
| 10:00 | 12:00 |
| 11:00 | 13:00 |
| 12:00 | 14:00 |
| 13:00 | 15:00 |
| 14:00 | 16:00 |
| 15:00 | 17:00 |
- 09:00 Newark / 11:00 Buenos Aires
- 12:00 Newark / 14:00 Buenos Aires
Seasonal and climate factors
Flight times between Newark and Buenos Aires can vary by 15–30 minutes seasonally due to shifting wind patterns along this long-haul corridor. Buenos Aires at 35°S experiences moderate seasonal daylight variation. Summer offers longer evenings useful for westward adjustment, while winter's earlier sunsets support eastward adjustment schedules.
How the Newark–Buenos Aires flight time is estimated
The 10h 00m to 11h 15m estimate for Newark to Buenos Aires is derived from the 8,548-km great-circle distance. Long-haul flights spend most of their duration at optimal cruise altitude (typically 35,000–40,000 feet), achieving effective speeds of 820–900 km/h. An additional 30–50 minutes accounts for taxi, takeoff, climb, descent, approach, and taxi at both EWR and EZE. Actual routing through controlled airspace may add 3–8% distance beyond the great-circle path due to air traffic corridors and restricted zones along the way.
Wind patterns and flight duration
Prevailing winds along the Newark–Buenos Aires corridor have a moderate effect on flight time. The general west-to-east flow of upper-level winds at these latitudes provides a slight tailwind advantage.
Practical travel context
This long-haul route connects Newark (United States) with Buenos Aires (Argentina).
Frequently asked questions: Newark to Buenos Aires
How long is the flight from Newark to Buenos Aires?
What is the time difference between Newark and Buenos Aires?
How bad is jet lag flying from Newark to Buenos Aires?
Can I minimize jet lag on the Newark to Buenos Aires route?
Is it better to fly during the day or at night from Newark to Buenos Aires?
How long does jet lag last from Newark to Buenos Aires?
What about the return flight from Buenos Aires to Newark?
More questions about this route
Should I adjust my schedule before flying from Newark to Buenos Aires?
What are the best business hours to schedule meetings between Newark and Buenos Aires?
How is the Newark to Buenos Aires flight time calculated?
Assumptions & notes
- Flight time based on Haversine great-circle distance (8,548 km) with speed heuristics.
- Cruise speed: 820–900 km/h + 30–50 min ground/air overhead.
- Time difference is approximate and may shift during DST transitions.
- Jet lag plan is general wellness guidance, not medical advice.
- Route: EWR (America/New_York) → EZE (America/Argentina/Buenos_Aires)