A coalition-dominated inquiry released its findings on Monday afternoon, calling on Transport Minister Catherine King to "immediately" review the Qatar decision.
Nationals senator Bridget McKenzie renewed her call for former Qantas CEO Alan Joyce to face the music, recommending the inquiry be extended after he failed to appear while overseas.
"At a time of a cost-of-living crisis in Australia, the government has made decisions that have protected Qantas' market share and kept the cost of airfares higher for Australian families and exporters," she said in a statement.
Labor senators released a dissenting report and brushed off any criticism, suggesting the coalition's findings were "inaccurate" and "obviously biased", along with lacking "regard to the complexity of the issue at hand".
 "It is disappointing this committee did not seek to make a meaningful contribution to the public debate but rather descended quite quickly into political antics," their report reads.
The inquiry was probing what impact Qantas had in the call to deny the extra flights.
It recommended the consumer watchdog play a much bigger role in the travel sector, including through reinstating its domestic airline monitoring.
The Australian Competition and Consumer Committee should run an inquiry into anti-competitive behaviour in domestic aviation, the committee added.
Ms King has offered a number of different reasons for rejecting Qatar's request, including looking after the aviation sector as it recovers from COVID and reducing emissions.
A 2020 incident at Doha's international airport where five Australian women underwent invasive gynaecological examinations was "a factor", she said.
But a lack of any specific reason has fuelled speculation as to what impact Qantas had on the call and Senator McKenzie said the government had "gagged" public servants to stop such an explanation coming out.
"Unfortunately, the government sought to prevent the committee from fully investigating the reasons why additional Qatar Airways flights were rejected by refusing to release documents and placing a gag on the infrastructure and foreign affairs departments," she said.
The coalition has indicated it will summon Mr Joyce to give evidence when he is back in the country, threatening to escalate things and even try to jail him if he doesn't comply.
Chairman Richard Goyder also appeared at the inquiry and insisted Qantas' major shareholders still wanted him in charge.
But the Australian Shareholders Association says the airline needs new executives and has repeatedly called for him to resign.
Qatar Airways estimates the extra flights would add $3 billion in economic benefits to Australia, the Victorian government previously predicting a second daily flight from Doha to Melbourne would create 900 jobs.
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