Two Hours New York To Tokyo? Japan Just Successfully Tested A Mach 5 Hypersonic Jet Engine

Imagine boarding a plane in New York after breakfast and touching down in Tokyo just in time for an early lunch.

For decades, crossing the Pacific Ocean has meant enduring a grueling 11- to 14-hour long-haul flight. But the dream of shattering that time barrier just took a massive leap closer to reality. In a milestone event for aviation history, the Japan Aerospace Exploration Agency (JAXA) has quietly stepped onto the supersonic stage, conducting a successful Mach 5 combustion test of a revolutionary hypersonic passenger jet engine.

Traveling at Mach 5—which is roughly 3,800 mph or five times the speed of sound—means a punishing 6,730-mile journey from New York (JFK) to Tokyo (NRT) could theoretically take just 1 hour and 45 minutes. 1 Here is a closer look at what went down during the test and what it means for the future of global travel.

What Exactly Did JAXA Test?

The trial, which took place at JAXA's Kakuda Space Center in Miyagi Prefecture, wasn't a standard aircraft runway takeoff. Instead, a collaboration of engineers from JAXA, Waseda University, the University of Tokyo, and Keio University subjected a compact, experimental aircraft model to a simulated Mach 5 flight environment.

The test focused on solving the two greatest engineering hurdles of hypersonic travel: propulsion and extreme heat.

1. The Hydrogen-Powered Ramjet Standard commercial aircraft use complex turbofan engines with thousands of moving parts to suck in and compress air. At Mach 5, however, the incoming airflow becomes completely unstable.

Instead, Japan is testing a hydrogen-fueled ramjet. This air-breathing engine has zero moving parts. It relies entirely on the vehicle’s incredibly fast forward motion to "ram" and compress incoming air before mixing it with hydrogen fuel for thrust. The result? A mechanically simpler engine that thrives at extreme velocities.

2. Defeating 1,000°C Temperatures

When an aircraft travels at 3,800 mph through the sky, the friction from air molecules is intense. Airflow around the nose and leading edges can easily reach temperatures exceeding 1,000°C (1,832°F)—an extreme thermal load capable of melting conventional aircraft structures.

Crucially, JAXA’s advanced thermal protection shield passed the test with flying colors. The specialized heat shielding managed to keep the interior of the aircraft near normal operating temperatures, ensuring that sensitive onboard electronics and flight control systems could function without frying.

Hypersonic vs. Supersonic: How It Compares

You might have heard of companies like Boom Supersonic, who are aiming to revive faster air travel with their "Overture" aircraft. However, what Japan is building belongs to an entirely different class of physics.

To put the raw speed into perspective, look at how the upcoming hypersonic tech stacks up against aviation legends and modern projects:

To truly appreciate the raw velocity of Japan’s hypersonic concept, it helps to look at how it stacks up against standard and historical aircraft. While a conventional commercial jet cruises at around 35,000 feet at a modest Mach 0.8 (~550 mph), requiring roughly 14 hours to fly from New York to Tokyo, supersonic alternatives significantly cut that time down. The legendary Concorde historically flew at 60,000 feet reaching Mach 2.0 (~1,350 mph) to complete the journey in about 6 hours, while modern projects like the Boom Supersonic Overture aim for a similar profile at Mach 1.7 (~1,300 mph) with a 5.5-hour flight time. Japan’s hypersonic concept, however, leaves them all in the dust by climbing to a staggering 90,000 feet and piercing the sky at Mach 5.0 (~3,800 mph), shattering the cross-Pacific travel time to well under two hours.

When Can We Book a Ticket?

While the test is an incredible breakthrough, you shouldn't pack your bags just yet.

Because ramjets cannot operate from a complete standstill, a hypersonic passenger jet requires a multi-stage propulsion system to get it off the ground and up to supersonic speeds before the ramjet can take over. According to the research team, the next phase of development will involve mounting the experimental vehicle onto a suborbital sounding rocket to test its aerodynamics during a real Mach 5 flight.

Experts and curators behind the project estimate that scaling this technology up safely into a commercial, passenger-ready vehicle will take roughly 20 years, targeting a commercial launch in the 2040s.

It’s a long-term vision, but by slowly and methodically solving the physics of extreme heat and hydrogen propulsion, Japan is laying the groundwork to change how humans connect across the globe forever.

American Airlines Enhances Their Network With New Routes From Chicago And Los Angeles

American Airlines is turning the heat up this winter with new routes for customers to see the world. Travelers are already starting to lock in their plans for summer, and the airline is responding to customer enthusiasm for travel with new routes from Chicago (ORD) and Los Angeles (LAX), building on an existing commitment to offer customers more nationwide travel options than any other airline.

“Air travel is about more than just flying from one place to another; it’s a symphony of travelers eagerly looking forward to seeing friends and family, crossing off bucket-list vacations and making a difference with face-to-face business meetings,” said Brian Znotins, American’s Senior Vice President of Network and Schedule Planning. “American’s new routes from Chicago and Los Angeles are just another way the airline is catering to all kinds of travelers with unmatched connectivity across the United States.”

Tickets for the new routes will be available for purchase starting Jan. 26 on aa.com or through American’s mobile app.

Departure airport Arrival airport Aircraft type Service start date Service end date Frequency

Chicago (ORD) Allentown, Pennsylvania (ABE) Embraer 170 May 21 Year-round Two daily flights

ORD Columbia, South Carolina (CAE) Embraer 170 May 21 Year-round Two daily flights

ORD Kahului, Hawaii (OGG) Boeing 787-8 Dec. 17 March 27, 2027 Daily service

Los Angeles (LAX) Cleveland, Ohio (CLE) Boeing 737 April 7 Year-round Daily service

LAX Washington, D.C. (IAD) Boeing 737 April 7 Year-round Daily service

Building a network for Chicagoans

In 1926, the roots of the American Airlines customers around the world know today were planted with a flight from Chicago to St. Louis. Since then, Chicago has remained an important part of the airline’s story. American’s network from Chicago has grown significantly over the past year, giving local residents more competitive access to more than 180 destinations they want to visit.

This included adding service last year to 29 new destinations such as Naples, Italy (NAP), St. Croix (STX), St. Maarten (SXM) and more. All new routes American launched from ORD last year will return this year. And, for those looking to start the year off with new trips, American will offer more than 500 peak daily departures just in time to shake off the cold and enjoy spring break.

In 2026, the airline continues to build on that commitment. OGG is one of the most-visited leisure destinations for Chicagoans in winter, and American’s nonstop service will offer Flagship® Business with lie-flat seats and Premium Economy choices for customers looking for premium seat options. Flights to ABE and CAE will also enable connections from those cities to destinations across the world that American and its best-in-class partners serve from ORD, like Honolulu, Tokyo and more.

These new routes elevate American’s competitive offerings, giving travelers more opportunities to earn and redeem AAdvantage® miles. Moreover, with premium seats on every flight, American is the only hub carrier giving Chicagoans the chance to upgrade their travel experience every time they fly.

Pressing play on new flights to Los Angeles

Eighty years ago, American became part of aviation history in the City of Angels as one of the first airlines to begin service at Los Angeles Municipal Airport. Since then, American has offered nonstop flights and premium experiences for travelers ranging from film industry icons to families looking to take in the California sun. American’s network from LAX is only getting bigger this year with new service to CLE. Also, new service to IAD will offer complementary service to American’s existing two daily flights to Ronald Reagan Washington National Airport (DCA), offering travelers up to three daily options between Los Angeles and Washington, D.C.

American and its partners fly to more than 85 destinations from LAX, giving AAdvantage® members the most comprehensive network of any major carrier for earning miles and status. With soccer fans already planning their visits to see their teams play on the world stage for FIFA World Cup 26TM, American alone will offer more than 145 peak daily departures this summer.

For travelers flying to or from LAX, American has made premium upgrades to its service. Late last year, the airline introduced the game-changing Airbus A321XLR featuring Flagship Suite® seats on flights to New York (JFK). This will expand to include flights to Boston (BOS) later this summer. And, starting March 28, American will introduce its premium Boeing 787-9, also featuring Flagship Suite® seats, on select flights to London (LHR).

A world-class network for travelers

American will offer up to 7,000 peak daily departures this summer, cementing the carrier’s position operating more flights than any other airline in the world. For travelers, this means more flight options and more opportunities to explore the world. From traveling to see major sporting events across the country to important business trips and everything in between, American’s flight options are designed with travelers in mind.

The world’s largest airline proudly celebrates its centennial year in 2026, reaching a milestone that reflects a century of innovation and the Forever ForwardSM spirit that changed the industry and the world. American introduced the first scheduled air cargo service, the first airport lounge and the first airline loyalty program and continues to reinvent the customer experience today. The airline is also a founding member of the oneworld alliance, whose members serve more than 900 destinations around the globe. Get the latest about American at news.aa.com and @AmericanAir.

American Airlines Unveils Special Flagship Livery Ahead Of Centennial Year

With just six months to go until American Airlines officially celebrates its centennial, the airline is unveiling a special livery that will begin flying in November on a Boeing 777-300 registered as N735AT. This special Flagship® livery blends one of the airline’s original liveries with a modern flair as American will upgrade the aircraft to feature a new, more luxurious interior.

“American has thoughtfully chosen a design that evokes our rich history while looking ahead to our next 100 years,” said Ron DeFeo, American’s Chief Communications Officer. “Throughout American’s history, ‘Flagship®’ has always been recognized as our premium travel experience. Our renewed focus on the customer experience is making premium travel better than ever across all aspects of our customers’ travel journeys. Painting the original Flagship® design on our Flagship® aircraft is a powerful way to honor that legacy while embracing the future.”

Behind the design

At the base of the livery is the airline’s Silver Eagle® paint color, which is currently found on more than 1,600 aircraft in American’s mainline and regional fleet. Across both sides of the aircraft, the iconic orange lightning bolt motif makes its bold reappearance after first debuting nearly 90 years ago on the Douglas DC-3. The DC-3 captivated passengers with American’s first foray into premium air travel experiences that the airline is now taking to new heights with its Boeing 777-300 aircraft flying to far-flung international destinations including Australia, Japan, the United Kingdom and beyond.

When American took delivery of new DC-3 aircraft, they were named based on cities the airline served at the time. In keeping with tradition, American will name this aircraft “Flagship DFW” as an homage to the airline’s home and largest hub.

Toward the rear of the aircraft, customers will notice a roundel featuring one of the most recognizable motifs from American’s history: the eagle connecting the world. American flies to more than 350 global destinations today and operates more flights carrying more customers than any other airline in the world — a reminder of how far the airline has come since its first flight in 1926.

The Flagship Knoxville housed in the American Airlines CR Smith Museum in Fort Worth, Texas.

Since American first took delivery of passenger aircraft in the 1930s, the airline has been known for offering an elevated “Flagship” experience first on board coast-to-coast transcontinental routes and today also includes the airline’s long-haul international network.

While customers recognize American’s premium Flagship® lounges and Flagship® Business class that have welcomed travelers for years, they will continue to enjoy the Flagship® experience next year, when the airline begins refreshing the interior of its Boeing 777-300 fleet to include Flagship Suite® seats.

American continues to focus on elevating the onboard customer experience to deliver a modern travel journey. After making their debut earlier this summer, the Flagship Suite® seats, Premium Economy and upgraded Main Cabin products continue to earn rave reviews from customers and are part of the airline’s commitment to innovation. Highlights include:

The Flagship Suite® seats are American’s first-ever onboard business class product featuring privacy doors, wireless charging pads and a one-of-a-kind chaise lounge seating option with an adjustable headrest pillow. American is the first U.S. carrier to introduce wireless charging in Premium Economy, which includes the introduction of new headrest wings and new calf and footrests for enhanced comfort. Main Cabin customers will experience the airline’s elevated international inflight experience, including 4K QLED screens — the first in the U.S. to be introduced in this cabin — and USB-C and AC power. These upgraded amenities will also be featured on board refreshed 777-300s next year, featuring 70 Flagship Suite® seats and 44 Premium Economy seats.

American's Flagship Suite® debuted on newly designed Boeing 787-9 aircraft this summer and will be on refreshed Boeing 777-300.

Be a part of American’s centennial

For more than 100 years, American has taken to the skies with timeless, iconic designs, and now, key moments from its rich history are available for purchase. The American Airlines Brand Store features a curated selection of historic advertising, vintage imagery and exclusive centennial-branded merchandise. Perfect for the holiday season, these keepsakes and gifts honor the legacy of aviation and design that has defined American for generations. Merchandise collections will continue to expand throughout the centennial year, offering even more ways to commemorate this milestone.