The 2009 H1N1 flu had approximately 14,000 deaths in the United States. Data is a bit specious (varies from about 12,000 - 18,000 depending on the source), but that should at least be in the ballpark.
There were 150,000–575,000 2009 H1N1 fatalities worldwide. The Covid-19 deaths (”11,400”) you are quoting are the worldwide - not USA - deaths.
https://en.wikipedia.org/wiki/2009_flu_pandemic
Thank you for the correction.