Have you ever delved into aviation by opening up AirNav Radar and wondered how twin-engine jets like the Boeing 787 or Airbus A350 safely cross vast oceans?
In this new short series we are doing here at Aviation Source News, we will explain to you all the unique and little details around aviation. We will go into details on how it works, how it came to be and how it changed our way of travel to this very day.
Welcome to Aviation Facts.
Volume One: ETOPS
So what is ETOPS? well first, lets explain what ETOPS stands for. ETOPS stands for: Extended‑range Twin‑engine Operational Performance Standards, and when it’s written out like that. I think we can all agree this anagram is a needed one!
Before we get into how ETOPS changed Aviation, let’s take a step back into history. We will see why something as simple as this has changed our world forever.
A World Before ETOPS
Before ETOPS, intercontinental routes were shaped not just by geography or demand but by the limits of engine reliability. A simple 7 hour flight from the UK to America today was a far more rigorous task back in the 90’s, even with planes such as the Boeing 747 in service.
Airlines had to design multi-stop journeys around available diversion points, making long-haul flying a multi-leg, sometimes multi-day endeavour.
Lets take a look at some of the routes we fly direct today and what that would have been like just 40 years ago.
Polar and Great Circle Routes (1960s–1980s)
- Aircraft: Boeing 747, DC-8, IL-62
- Routes: Chicago → Tokyo (via Anchorage); Moscow → New York (via Reykjavik and Gander)
These routes relied on Arctic refueling hubs to remain compliant with safety rules. ETOPS did not yet allow twinjets over such isolated regions.
Air France & Lufthansa South Atlantic Routes
- Aircraft: Boeing 707, DC-10, Boeing 747
- Route: Paris/Frankfurt → Dakar → Rio de Janeiro → Buenos Aires
South Atlantic crossings required long-range, often four-engine aircraft due to the scarcity of suitable diversion airports between West Africa and South America.
With just these two historic route examples you can see how hard it was to travel back then. Those hardships for travel however, would not last long.
In 1986 the U.S. Federal Aviation Administration (FAA) officially introduced ETOPS. With engines now becoming more reliable than ever, they days of long multi-leg stopovers were coming to an end.
Before we continue, I can already hear you saying “but didn’t 4 engine aircraft cross the Atlantic already?”. Okay, yes the 747 by the time the Boeing 767 ER was around, where able to conduct services over the Atlantic, but the Boeing 747 was expensive and what ETOPS allowed, was airlines to be more expansive with cheaper and smaller planes.
The Worlds First ETOPS Flight
In 1985 the FAA granted the first ETOPS-120 certification to the Boeing 767 which was able to fly routes that kept it within 120 minutes of the nearest airport.
The first ETOPS flight was operated by Trans World Airlines (TWA) from Boston to Paris using a Boeing 767-200. The flight took off on February first and made history as it touched down later that day in Paris. A new world had sprung into life and the way we travel had changed forever.
What followed next, was a frenzy of Airlines such as Air Canada following Trans World Airlines’ success, with new routes opening up around the globe to destinations previously needing days to get to.
The Race for larger ETOPS
With ETOPS-120 now a reality and planes flying on routes that were viable with this certification, the race was not just on for airlines, but engine manufactures. Who to this day still strive to build, bigger, more efficient and more powerful engines allowing larger ETOPS capacity.
In the table below we will show you all the different type of ETOPS certifications which exist at this moment in time, with that only expecting to increase as planes become, lighter, faster and more efficient.
| ETOPS Level | Max Time (Minutes) | Approx Distance (km) | Typical Routes Covered |
| ETOPS-60 | 60 | 805 | Short-haul & early twins (no ocean) |
| ETOPS-120 | 120 | 1,609 | North Atlantic (with routing constraints) |
| ETOPS-180 | 180 | 2,414 | Most transatlantic flights |
| ETOPS-240 | 240 | 3,219 | South Atlantic, Indian Ocean segments |
| ETOPS-330 | 330 | 4,828 | Transpacific (e.g., Japan–Hawaii) |
| ETOPS-370 | 370 | 5,955 | Extreme Long-Haul routes (e.g., NZ–S. America) |
Behind the Certification
So now that we have given you a brief history on what ETOPS is and how it works, lets take a dive into how exactly that certification is given.
Before you can be ETOPS certified both the Airline and the aircraft must meet a very strict standard. For example the aircraft must demonstrate a high reliability- especially in engine performance. So how strict are we talking?
Well to qualify for ETOPS-120, the engine must show fewer than 1 in-flight shutdown per 20,000 hours. For ETOPS-180, that number is stricter: 1 per 50,000 hours.
So what rules must the airline follow? The airline itself must also undergo certification.
It needs a robust maintenance program, special crew training, real-time engine monitoring, and a plan for how to handle emergency diversions over remote regions like the Atlantic or Pacific.
When you bring all of this together, you can see that ETOPS certifications are not a simple as walking up to Airbus and buying an A350. While the plane and engine are both eligible for that certificate, you must also meet the safety requirements expected.
Once both the aircraft and the operator meet the criteria, authorities like the FAA or EASA grant them an ETOPS rating—starting at 75 or 120, with the potential to grow based on operational history.
Famous Flights Made Possible by ETOPS
As we mentioned before the race was on for new routes and new markets for airlines, and below we will list out just some of the famous modern day ultra-long haul flights you can take today thanks to ETOPS.
- Singapore Airlines: Singapore (SIN) → New York‑JFK & SIN → Newark (EWR). About 18h 40m nonstop on an Airbus A350‑900ULR
- Qatar Airways: Auckland (AKL) → Doha (DOH). Roughly 15,010 km nonstop on an A350‑1000
- Qantas: Project Sunrise (planned) Sydney–London & Sydney–New York flights: ~17,700 km, up to 22 hours nonstop using specially outfitted A350‑1000ULR from mid‑2026
- United Airlines: San Francisco (SFO) → Singapore (SIN). Approximately 13,600+ km (8,500–8,750 nmi) in ~17 h nonstop aboard a 787‑9
It may seem like we have ultimatley completed the conecpt of ultra-long haul, so that really leads us onto our final question and point in this article.
What’s Next for ETOPS?
As technology in Aviation improves, so do the boundaries of ETOPS. The Airbus A350 is currently certified for ETOPS-370, allowing flights up to 6 hours and 10 minutes from the nearest airport. That means it can safely fly virtually any route on the planet.
What’s next?
- ETOPS-420 is technically feasible, though not yet certified.
- Advanced engine health monitoring and predictive maintenance could help extend limits.
- Even private jets like the Gulfstream G650 are subject to ETOPS for long-range operations.
In the future, we may not even call it ETOPS anymore—regulators may adopt a broader “EOPS” (Extended Operations) framework to cover all aircraft types, not just twins.
