Delta Air Lines is launching a new route on its own metal (thanks to @IshrionA for flagging this), though only for a limited time…
Delta will fly from Boston to Sao Paulo in early 2025
Between January 6 and March 27, 2025, Delta is operating a 3x weekly flight between Boston (BOS) and Sao Paulo (GRU). The 4,790-mile flight will operate with the following schedule:
DL165 Boston to Sao Paulo departing 9:00AM arriving 8:45PM
DL164 Sao Paulo to Boston departing 10:45PM arriving 6:40AM (+1 day)
The southbound flight is blocked at 9hr45min, and will operate on Mondays, Thursdays, and Fridays, while the northbound flight is blocked at 9hr55min, and will operate on Wednesdays, Thursdays, and Sundays.
While the outbound flight timing is great in terms of aircraft utilization (since the plane can turn right around in Sao Paulo), the daytime flight isn’t necessarily preferred by many business travelers, and it’s also not great for connections.
Delta will use an Airbus A330-300 for the service, featuring 282 seats. This includes 34 Delta One (business class) seats, 21 Delta Premium Select (premium economy) seats, 24 Delta Comfort+ (extra legroom economy) seats, and 203 Main Cabin (economy) seats.
It would appear that Delta is simply replacing the service of its joint venture partner LATAM in the market for a period of roughly three months. LATAM has operated this route since 2018. Delta’s new service has identical timing to LATAM’s service, which is why it seems like it’s a replacement. Meanwhile LATAM will operate this service through early January, and again as of late March.

It’s interesting to see Delta replacing LATAM in the market
Delta owns a stake in LATAM, and on top of that, the two airlines have a joint venture between the United States and much of South America. With a joint venture, airlines can coordinate schedules and fares, and can also share revenue.
We often see joint venture partners replace Delta in some markets, which is logical enough, since Delta has a higher cost structure than most of its partners. For example, we’ve seen Delta axe service between Los Angeles (LAX) and London (LHR), and instead that route is exclusively operated by partner Virgin Atlantic.
So in this situation, why is Delta replacing its joint venture partner LATAM, which almost certainly has a lower cost structure? In this case it seems easy enough to figure out:
- US airlines can’t get their hands on enough wide body aircraft for their summer schedule, given the amount of transatlantic demand; however, the first three months of the year are the absolute slowest across the Atlantic
- As a result, Delta presumably has some spare aircraft, so the airline needs to fly them somewhere
- Meanwhile in South America, those same months are peak season (given that it’s summer in the Southern Hemisphere), so I suspect LATAM can better utilize its aircraft for other routes
All of this seems like a logical enough development. If Delta permanently replaced LATAM in this market, then I’d be a bit confused. But with Delta just taking over the service during its slowest period for long haul travel, this makes sense.

Bottom line
Delta will operate flights between Boston and Sao Paulo in early 2025, replacing the existing service by joint venture partner LATAM. It may seem confusing to see Delta get into this market for just a few months, especially given that Delta has a higher cost structure than LATAM. But it’s easier to make sense of when you look at the big picture, and consider the other places LATAM can fly planes that time of year.
What do you make of Delta launching Boston to Sao Paulo flights?
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