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Summary:
- New Buenos Aires to Shanghai route starting December 4.
- Up to 29 hours of total travel time.
- Quick technical stop in Auckland.
- Operated with a Boeing 777-300.
- Economy fares from €1 300.
Long-distance travel sometimes brings unexpected opportunities, and this new route from China Eastern Airlines is one of them. By linking Argentina and China on a single itinerary, the airline introduces a long and unusual journey rarely seen in commercial aviation. The stop in Auckland is short, and the total travel time ranges from 25 to 29 hours depending on the direction.
For travelers planning a crossing between hemispheres, this connection avoids the usual detours through Europe or the Middle East. It also offers a view of remote southern skies that few people ever experience from the air. The sections below give clear and practical insights into the route, flight durations, aircraft, fares and tips to prepare for such a long trip.
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A south to north journey linking distant cities
Buenos Aires and Shanghai are located on opposite sides of the globe. Most airlines avoid pairing them directly because of distance and operational limits. China Eastern uses a simple structure; Shanghai to Auckland, then Auckland to Buenos Aires.
Why Auckland
Auckland works as a convenient point for refueling and crew rest while keeping a clean southern arc across the Pacific. It avoids transfers through northern hubs and keeps the itinerary compact.
Flight duration overview
| Segment | Approx. duration | Notes |
| Shanghai to Auckland | 13 to 14 h | Varies with winds and season. |
| Auckland to Buenos Aires | 11 to 12 h | Southern Pacific path. |
| Auckland stop | About 2 h | Passengers usually stay onboard. |
Depending on the direction and weather, total travel time sits between 25 h 30 and 29 h.
A rare southern route close to Antarctic waters
Most long-haul commercial routes stay in northern corridors. This one crosses deep into southern latitudes and passes over large stretches of ocean with almost no traffic.
Buenos Aires to Shanghai flight
- Very long segments with no visible land.
- A trajectory that passes close to Antarctic waters.
- A shorter overall distance than routing through northern regions.
China Eastern reports that the southern approach saves around four hours compared with more conventional alternatives.
Buenos Aires to Shanghai flight
Since the Auckland stop is short, passengers usually remain onboard. Bringing a few comfort essentials such as a small pillow, layers or water can make the long journey more pleasant.
The aircraft and what you can expect onboard
The route is operated with a Boeing 777-300, a wide-body aircraft appreciated for stability and comfort on long flights.
Cabin options
| Class | What you get | One-way price |
| Economy | Standard seating, meals, entertainment | €1 300 to €1 920 |
| Business | Lie-flat seats, more privacy, upgraded service | About €4 250 |
Onboard experience
- Several meal services throughout the journey.
- A large entertainment selection.
- Limited movement options because the Auckland stop is short.
- A cabin layout well suited for long-haul travel.
An upgrade to lie-flat seating can make a noticeable difference on flights of this length.
Preparing for a 25 hour or longer trip
Planning ahead helps when your travel time covers nearly a full day.
Practical checklist
- Choose your seat early. Window for stability, aisle for movement.
- Bring sleep essentials. Eye mask, neck pillow, compression socks.
- Stay hydrated throughout the flight.
- Adjust your schedule to manage the time difference.
- Keep important items accessible. Chargers, snacks, light layers.
What this means for you
This route is suitable for travelers who prefer fewer connections. Even though the journey is long, having only one stop can make travel planning easier.
How it compares to other ultra long flights
China Eastern highlights the impressive total travel time, but the flight is not nonstop. It does, however, rank among the longest commercial journeys available in 2025.
Comparison table
| Airline | Route | Nonstop | Duration |
| China Eastern | Buenos Aires to Shanghai | No | Up to 29 h |
| Singapore Airlines | Singapore to New York | Yes | 18 to 19 h |
| Qantas (Project Sunrise) | Sydney to London | Yes | 19 to 20 h |
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The Buenos Aires to Shanghai route stands out mainly for its extraordinary total duration and its unusual southern trajectory.
China Eastern’s new link between Buenos Aires and Shanghai offers a fresh option for travelers moving between Asia and South America. With its southern routing, brief Auckland stop and long uninterrupted segments, it provides a distinctive way to cross the planet. For those comfortable with extended hours in the air, it removes the need for multiple layovers and streamlines an otherwise complex journey.
