Training missions were typically in two parts, a 40-hour flight—followed by time on the ground for refueling and maintenance—and then a 24-hour second flight.
With a sufficiently light load, the B-36 could fly at least 10,000 mi (16,000 km) nonstop, and the highest cruising speed of any version, the B-36J-III, was at 230 mph (380 km/h).
Engaging the jet engines could raise the cruising speed to over 400 mph (650 km/h).
Hence, a 40-hour mission, with the jets used only for takeoff and climbing, flew about 9,200 mi (15,000 km).

Due to its massive size, the B-36 was never considered sprightly or agile; Lieutenant General James Edmundson likened it to "...sitting on your front porch and flying your house around."
Crew compartments were nonetheless cramped, especially when occupied for 24 hours by a crew of 15 in full flight kit.

War missions would have been one-way, taking off from forward bases in Alaska or Greenland, overflying the USSR, and landing in Europe, Morocco, or the Middle East.
Veteran crews recall feeling confident in their ability to fly the planned missions, but not to survive weapon delivery, as the aircraft may not have been fast enough to escape the blast.
These concerns were borne out by the 1954 Operation Castle tests, in which B-36s were flown at the combat distance from the detonations of bombs in the 15-megaton range.
At distances believed typical of wartime delivery, aircraft suffered extensive flash and blast damage.
Training missions were typically in two parts, a 40-hour flight—followed by time on the ground for refueling and maintenance—and then a 24-hour second flight. With a sufficiently light load, the B-36 could fly at least 10,000 mi (16,000 km) nonstop, and the highest cruising speed of any version, the B-36J-III, was at 230 mph (380 km/h). Engaging the jet engines could raise the cruising speed to over 400 mph (650 km/h). Hence, a 40-hour mission, with the jets used only for takeoff and climbing, flew about 9,200 mi (15,000 km).
Due to its massive size, the B-36 was never considered sprightly or agile; Lieutenant General James Edmundson likened it to "...sitting on your front porch and flying your house around." Crew compartments were nonetheless cramped, especially when occupied for 24 hours by a crew of 15 in full flight kit.
War missions would have been one-way, taking off from forward bases in Alaska or Greenland, overflying the USSR, and landing in Europe, Morocco, or the Middle East. Veteran crews recall feeling confident in their ability to fly the planned missions, but not to survive weapon delivery, as the aircraft may not have been fast enough to escape the blast. These concerns were borne out by the 1954 Operation Castle tests, in which B-36s were flown at the combat distance from the detonations of bombs in the 15-megaton range. At distances believed typical of wartime delivery, aircraft suffered extensive flash and blast damage.
Convair B-36 Peacemaker