Compare one-way and round-trip flight prices

(() => {
const clean=s=>String(s||'').replace(/\s+/g,' ').trim();
const visible=e=>{const r=e?.getBoundingClientRect(),s=e&&getComputedStyle(e);return !!e&&r.width>0&&r.height>0&&s.display!=='none'&&s.visibility!=='hidden'};
const body=clean(document.body?.innerText),priceRe=/(?:US\s*)?\$\s*[\d,]+(?:\.\d{2})?|[\d,]+(?:\.\d{2})?\s*(?:USD|US\$)/gi;
const amount=s=>{const m=String(s||'').replace(/,/g,'').match(/(?:\$|USD|US\$)\s*(\d+(?:\.\d{2})?)|(\d+(?:\.\d{2})?)\s*(?:USD|US\$)/i);return m?Number(m[1]||m[2]):null};
const botChallenge=/captcha|verify you are human|bot challenge|unusual traffic|access denied/i.test(body)||!!document.querySelector('iframe[src*="captcha"],[id*="captcha" i],[class*="captcha" i]');
const error=/unable to complete your request|we['’]re sorry|try again later|request.*(?:error|complete)|system error|technical difficulties/i.test(body);
const unavailable=/not available|outside.*(?:booking|schedule)|select a different date|date.*unavailable|currently unavailable/i.test(body)&&!error;
const empty=/no flights|no results|nothing found|empty/i.test(body)&&!error&&!unavailable;
const cards=[...document.querySelectorAll('div[class*="flightContainer"]')].filter(c=>visible(c)&&/Origin|Destination/i.test(c.innerText||''));
const flights=cards.map((card,index)=>{const text=clean(card.innerText),times=text.match(/\b(?:1[0-2]|[1-9]):[0-5]\d\s*(?:AM|PM)\b/gi)||[],prices=[...new Set((text.match(priceRe)||[]).map(clean))],nums=prices.map(amount).filter(Number.isFinite),labels=[...new Set([...card.querySelectorAll('button,[role="button"]')].map(e=>clean((e.innerText||'')+' '+(e.getAttribute('aria-label')||'')+' '+(e.getAttribute('aria-labelledby')||'')).replace(/\s+select to view fare options$/i,'')).filter(x=>/economy|premium plus|polaris|refundable|basic/i.test(x)))],stops=text.match(/\b(?:\d+ STOP|NONSTOP)\b/i)?.[0]||null;return{index,origin:text.match(/\b([A-Z]{3}) Origin\b/i)?.[1]||null,destination:text.match(/Destination[\s\S]*?\(([A-Z]{3})\)/i)?.[1]||null,depart:times[0]||null,arrive:times[1]||null,duration:text.match(/\b\d+H(?:,\s*\d+M)?\b/i)?.[0]||null,stops,flightNumbers:[...new Set(text.match(/\bUA\s*\d{2,4}\b/gi)||[])],fareLabels:labels,farePrices:prices,lowestDisplayedFare:nums.length?Math.min(...nums):null,isNonstop:/^NONSTOP$/i.test(stops||''),isPremiumEconomy:labels.some(x=>/premium plus|premium economy/i.test(x))||/premium economy|premium plus/i.test(text),isRefundable:/refundable|fully refundable|refundability/i.test(text)||labels.some(x=>/refundable/i.test(x)),hasBasicEconomy:/basic economy/i.test(text)||labels.some(x=>/basic/i.test(x)),soldOut:/sold out|not available|unavailable/i.test(text),text:text.slice(0,2000)}});
const allText=[...document.querySelectorAll('body *')].filter(visible).map(e=>clean(e.innerText)).filter(t=>t&&t.length<900);
const evidence=(re,n)=>[...new Set(allText.filter(t=>re.test(t)&&([...t.matchAll(priceRe)].length||/refundable|basic economy/i.test(t))).slice(0,n))];
const fares=flights.flatMap(f=>f.farePrices).map(amount).filter(Number.isFinite);
return{url:location.href,pageType:/choose-travelers|traveler/i.test(location.pathname)?'traveler-or-cart':'flight-results',searchState:botChallenge?'bot-challenge':error?'site-error':flights.length?'results':unavailable?'date-unavailable':empty?'empty':'unknown',botChallenge,totalCards:flights.length,lowestDisplayedFare:fares.length?Math.min(...fares):null,flights:flights.slice(0,50),filterEvidence:{refundable:/refundable|fully refundable/i.test(body),basicEconomyExcluded:/basic economy.*(?:excluded|omit|remove)|exclude.*basic economy/i.test(body)||/[?&]bef=0(?:&|$)/i.test(location.search),premiumEconomy:/premium economy|premium plus/i.test(body),nonstop:/nonstop|direct/i.test(body),queryParams:Object.fromEntries(new URL(location.href).searchParams)},returnFareEvidence:evidence(/return|round trip|select .*fare|economy|business|first/i,30),totalEvidence:evidence(/total due|trip total|itinerary total|price breakdown|total price|grand total/i,20),body:body.slice(0,1600)};
})()