United Airlines is using Starlink to provide in-flight WiFi on its aircraft, as reported by a passenger who used the service on a recent flight.

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  "company": {
    "name": "United Airlines",
    "domain": "united.com"
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    "post_id": "1wqn99l",
    "summary": "United Airlines is using Starlink to provide in-flight WiFi on its aircraft, as reported by a passenger who used the service on a recent flight.",
    "category": "In-flight WiFi",
    "comments": [
      {
        "url": "https://www.reddit.com/r/ipv6/comments/1wqn99l/comment/pc5alh8/",
        "depth": 0,
        "score": 40,
        "author": "Ok-Eggplant-7569",
        "excerpt": "CGNAT definitely has some impact, but it shouldn't be more than a couple of milliseconds. More likely that IPv6 just has better routing to the server. (A traceroute for v6 and v4 would've been interesting)",
        "posted_at": "2026-09-26T10:40:19.000Z",
        "author_url": "https://www.reddit.com/user/Ok-Eggplant-7569/"
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      {
        "url": "https://www.reddit.com/r/ipv6/comments/1wqn99l/comment/pc5afl6/",
        "depth": 0,
        "score": 13,
        "author": "ottantanove",
        "excerpt": "It could also be that the routing is different and IPv6 simply takes a more efficient route. It's two different routing tables after all.",
        "posted_at": "2026-09-26T10:39:01.000Z",
        "author_url": "https://www.reddit.com/user/ottantanove/"
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      {
        "url": "https://www.reddit.com/r/ipv6/comments/1wqn99l/comment/pc5achd/",
        "depth": 0,
        "score": 9,
        "author": "mdpeterman",
        "excerpt": "I’m just impressed the in-flight Wi-Fi had working IPv6 at all, let alone it being faster. I have yet to be on a flight with working IPv6.",
        "posted_at": "2026-09-26T10:38:21.000Z",
        "author_url": "https://www.reddit.com/user/mdpeterman/"
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      {
        "url": "https://www.reddit.com/r/ipv6/comments/1wqn99l/comment/pc5kjxn/",
        "depth": 0,
        "score": 6,
        "author": "varget82",
        "excerpt": "Since NAT is stateful I just assume it’s sticky to a CGNAT box. And IPv6 just get more optimal routing updates when you move.\n\n I wouldn’t assume this to be an issue on more stationary use cases.",
        "posted_at": "2026-09-26T11:51:34.000Z",
        "author_url": "https://www.reddit.com/user/varget82/"
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      {
        "url": "https://www.reddit.com/r/ipv6/comments/1wqn99l/comment/pc7axy4/",
        "depth": 0,
        "score": 4,
        "author": "innocuous-user",
        "excerpt": "It looks like the two routes are taking opposite paths around the world.\n\n Legacy traffic is heading east via europe, while v6 traffic is heading west directly across the pacific to japan.",
        "posted_at": "2026-09-26T16:59:42.000Z",
        "author_url": "https://www.reddit.com/user/innocuous-user/"
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      {
        "url": "https://www.reddit.com/r/ipv6/comments/1wqn99l/comment/pc62ywd/",
        "depth": 0,
        "score": 2,
        "author": "CauaLMF",
        "excerpt": "Ipv4 tá com mais pontos de roteamento que o ipv6 e é rotas piores",
        "posted_at": "2026-09-26T13:35:02.000Z",
        "author_url": "https://www.reddit.com/user/CauaLMF/"
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        "url": "https://www.reddit.com/r/ipv6/comments/1wqn99l/comment/pc7joe4/",
        "depth": 0,
        "score": 2,
        "author": "zhurai",
        "excerpt": "IPv4: hurricane electric (san jose -> new york -> london -> amsterdam) -> MTN SA (africa) -> starlink (LA) -> ?\n\n IPv6: hurricane electric (san jose) -> HE/KDDI peering -> KDDI (Japan) -> Starlink (Japan) -> ?",
        "posted_at": "2026-09-26T17:37:57.000Z",
        "author_url": "https://www.reddit.com/user/zhurai/"
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        "url": "https://www.reddit.com/r/ipv6/comments/1wqn99l/comment/pc9459g/",
        "depth": 0,
        "score": 1,
        "author": "crazzygamer2025",
        "excerpt": "It might be because on ipv4 it might be reaching the 1200 Port limit which is on any connection that use a CGnat on starlink. Even without hitting that limit the latency still is like 10 to 20 milliseconds higher than on IPv6.",
        "posted_at": "2026-09-26T21:55:23.000Z",
        "author_url": "https://www.reddit.com/user/crazzygamer2025/"
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    "evidence": [
      "[post] I was on a United flight yesterday with the new Starlink-backed WiFi and noticed that IPv4 ping to my server was around 300-400ms while IPv6 ping to the same destination ran 120-140ms."
    ],
    "virality": "somewhat_high",
    "post_date": "2026-09-26T10:34:56.000Z",
    "post_kind": "text",
    "post_text": "I was on a United flight yesterday with the new Starlink-backed WiFi and noticed that IPv4 ping to my server was around 300-400ms while IPv6 ping to the same destination ran 120-140ms.\n\nIs the CGNAT hit on Starlink that significant? Any Starlink customers that can confirm?\n\nUPDATE: Here are the traceroutes from the server (HE FMT2) to the Starlink addresses that were used. Next flight with Starlink I'll trace from the other direction. Does look like the IPv4 routing is substantially different. First hop removed for privacy.\n1 * * *\n2 be7.core2.fmt2.he.net (184.104.188.173) 3.098 ms 3.405 ms 2.103 ms\n3 be10.core1.sjc2.he.net (72.52.92.137) 134.932 ms 136.218 ms 163.183 ms\n4 be2.core1.nyc4.he.net (184.104.189.61) 139.041 ms 140.540 ms 139.116 ms\n5 be10.core4.lon2.he.net (184.104.196.70) 138.587 ms 139.809 ms 137.414 ms\n6 be3.core3.ams1.he.net (184.104.188.218) 139.462 ms 138.477 ms 139.042 ms\n7 port-channel28.core2.ams1.he.net (184.105.213.230) 136.168 ms 135.890 ms 138.136 ms\n8 mtn-globalconnect-solutions-ltd.e0-30.switch1.ams6.he.net (216.66.83.127) 137.624 ms 137.990 ms 137.557 ms\n9 41.181.244.240 (41.181.244.240) 278.220 ms 277.950 ms 277.955 ms\n10 41.181.190.185 (41.181.190.185) 154.044 ms 153.978 ms 153.987 ms\n11 41.181.105.114 (41.181.105.114) 263.414 ms 263.968 ms 263.547 ms\n12 41.181.190.128 (41.181.190.128) 272.004 ms 272.026 ms 272.089 ms\n13 41.181.244.5...",
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    "event_date": "2026-09",
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    "post_title": "Starlink - Fast IPv6, Slow IPv4?",
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    "source_url": "https://www.reddit.com/r/ipv6/comments/1wqn99l/starlink_fast_ipv6_slow_ipv4/",
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