import tls_client

session = tls_client.Session(client_identifier='chrome_112')


r = session.get('https://booking.flyfrontier.com/Flight/InternalSelect?o1=DEN&d1=LAS&dd1=2023-08-30&ADT=1&umnr=false&mon=true', headers={
    "authority": "www.flyfrontier.com",
    "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
    "accept-language": "en-US,en;q=0.9,zh-CN;q=0.8,zh;q=0.7,ru;q=0.6",
    "cache-control": "no-cache",
    "pragma": "no-cache",
    "sec-ch-ua": "\"Not/A)Brand\";v=\"99\", \"Google Chrome\";v=\"115\", \"Chromium\";v=\"115\"",
    "sec-ch-ua-mobile": "?0",
    "sec-ch-ua-platform": "\"macOS\"",
    "sec-fetch-dest": "document",
    "sec-fetch-mode": "navigate",
    "sec-fetch-site": "none",
    "sec-fetch-user": "?1",
    "upgrade-insecure-requests": "1",
    "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36"
})
print(r.text)