According to govfacts.org one tomahawk missile costs between $1.75 and $4 million.
Estimates for universal free school lunch are harder to find, but these two sources say $30 billion and $27 billion.
That means roughly 7000 to 17000 missiles to one year of universal free school lunch. Of course, this does not take into effect the other benefits of universal free lunch. Right off the bat, there would be a reduced administrative cost in tracking and verifying free lunch eligibility. Then there are things like increased attendance and focus in class which lead to long term benefits of a better educated person and more.
It is widely reported that the US has used more than 850 tomahawk missiles in the first four weeks of this war. That means the cost of the war in missiles alone is somewhere between $1.5 and $3.4 billion.

Research Report 90 claims reviewed · 55 sources reviewed Verified: Mar 3, 2026 Sources Reviewed (55) aei.org airandspaceforces.com armedservices.house.gov breakingdefense.com businessinsider.com commondreams.org comptroller.war.gov congress.gov defenseandmunitions.com docs.house.gov dsca.mil dsm.forecastinternational.com en.wikipedia.org everycrsreport.com finviz.com forecastinternational.com fortune.com govregs.com gurufocus.com highergov.com hoover.org ips-dc.org iran-cost-ticker.com iwm.org.uk law.cornell.edu lockheedmartin.com media.defense.gov news.usni.org opensecrets.org politico.com pro.thestreet.com publicintegrity.org readsludge.com rtx.com sam.gov secnav.navy.mil shop.ssbcrack.com sundayguardianlive.com tbsnews.net […]