A bomber can fly from Europe to the US in roughly 5 to 12 hours, depending on the aircraft, route, payload, weather, and whether it is refueled in the air. The fastest operational bomber widely cited today is the Russian Tu-160, with a top speed around Mach 2.05, while the B-1B Lancer is the fastest bomber in the US inventory at about Mach 1.25.
What that means in practice
Speed alone does not decide the trip time. A bomber usually flies well below top speed for most of a long transatlantic mission, because range, fuel use, airspace restrictions, and tanker support matter more than maximum velocity. A straight-line crossing from western Europe to the eastern US is only part of the story, since real missions often include detours, climb and descent, refueling, and coordination with escort or support aircraft. For a rough sense of scale, a modern bomber cruising near transonic or subsonic speeds would take several hours to cross the Atlantic. If it can make a brief supersonic dash, that shaves time, but it still does not turn a transatlantic mission into a one-hour trip. The XB-70 Valkyrie is often mentioned in speed discussions because it reached about Mach 3 in testing, but it was an experimental aircraft, not an operational bomber.
Why the answer varies
- Aircraft type: A B-52 is far slower than a B-1B or Tu-160, and that changes the crossing time a lot.
- Refueling: With aerial refueling, a bomber can extend range and arrive in better condition, but refueling itself adds time.
- Mission profile: Military aircraft rarely fly at maximum speed for the entire route.
- Distance: Europe to the US can mean anything from the UK to the US East Coast, or from farther inland Europe to the central US, which changes the total flight time.
Simple answer
If you want the shortest practical answer, a fast bomber could cover Europe to the US in about half a day or less, and a very fast one might do it in closer to 5 to 7 hours under favorable conditions. For most real-world bomber missions, though, 6 to 10 hours is a more believable estimate than anything based on top speed alone.