The Senators (5-0-3) are the last team without a loss in the Eastern Conference. After losing leads in their last two games, the Senators withstood Pittsburgh's 16-shot, two-goal attack in the third period.
Jaromir Jagr scored his eighth goal of the season for Pittsburgh but failed to score on two breakaways.
The Senators were leading 1-0 at 9:31 of the second period when Magnus Arvedson bumped Martin Straka off the puck, then centered to Bonk, who beat Garth Snow for his fourth goal.
Penguins defenseman Jiri Slegr fell down at the blue line at 15:30 of the second and Bonk was able to easily skate past defenseman Michal Rozsival to set up Arvedson's fifth goal.
Mike Fisher scored in the first period for Ottawa. Defenseman Janne Laukkanen lst the puck along the boards and Fisher skated out and surprised Snow with a shot from the high slot.
Kovalev's pass set up Jagr's power play goal at 7:00 of the third. Goalie Jani Hurme got his left pad out to stop Jagr on a breakaway midway through the first period. Jagr had a short-handed breakaway in the second period, but his shot grazed the crossbar and sailed over the glass.
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