I have to catch a flight at Haneda at 8:30pm from Peninsula Tokyo on a Friday evening. Will there likely be serious traffic jam around that time? Since there is no airport limousine bus between Peninsula and Haneda, what is the alternative to taxi?

Are you talking about the Miura Peninsula like from Yokotsuka?

Take the Keikyu line to Kamata then change to Haneda. Or take either JR or Keikyu line to Yokohama Stn then walk over to the bus terminal and take the Limo bus to Haneda. Taking a taxi from Yokohama stn to Haneda is not too bad either.

From the Peninsula Tokyo Hotel walk over to Yurakucho Station, get on the Yamanote Line to Hamamatsucho Station then change to the Tokyo Monorail to Haneda.

Takes about 30~35 minutes and costs 600 yen. For only 550 yen, go to Shinagawa Station instead, and change to the Keikyu Line to haneda. Both work fine.

http://www.tokyosubway.info/haneda.html you can see it on my simplified map.

Edit, I assume you mean the Peninsula Tokyo as in this hotel:
http://www.peninsula.com/Tokyo/en/default.aspx

Sorry that I misunderstood.

In addition to Tycoon's excellent instructions, the Monorail has express trains to Haneda from Hamamatsucho which can save some time. So take a look at the signs on the platform and decide which train you want to take.

As for the Keikyu line from Shingawa to Haneda, make sure you know whether you are boarding a direct train to Haneda or thru train to Yokohama and further south. In the later case, you need to change at Keikyu Kamata stn. to the Haneda train. Some early morning express from Shinagawa to Haneda can take as little as 15 minutes (before 6AM). But most directs take about 25 minutes.

Monorail has two stations at Haneda, one for JAL and one for ANA but Keikyu line use only one station.

As for taking a taxi, we took a taxi Friday a week ago from Haneda to Marunouchi and dropped off my luggage at Shinagawa on the way, it took over an hour in the rain and over Y6000.

BTW, unlike Narita, it is not unprecedented to take a cab from the eastern side of Tokyo (where the Pen is located) to Haneda.

I think there won't be express monorails at that time in the evening, but it only adds about 10 minutes to the trip.

Thanks. I meant Peninsula Hotel in Tokyo. I had taken a cab from Haneda to the Hotel which had cost me around 5000-6000yen which was acceptable. I was worrying that if I take cab to the airport during Friday rush hour the taxi bill might blow my budget. Anybody can share his/her experience?

If you are a bit gutsy, you could take a cab from the Pen as late as 7pm and still catch your HND flight, it's an incredibly efficient airport. I don't think evening rush hour will be a major problem, even if you leave a bit earlier. The morning rush hour in Tokyo is the major one, evening rush hour is spread out over a longer length of time because of the tendency of many Japanese to work long hours.

Unless it's an international flight, in which case you'll want to leave some time open in case immigration is jam-packed.

Totally agree...

I left Marunouchi once 50 minutes before flight time, took Yamanote line and Monorail and made the flight.

Haneda, and Itami, are very efficient airports.

In the normal understated manner, the priority security line is thru a narrow aisle almost invisible; without red carpets and such in other countries.

I've only arrived internationally at HND twice (never departed) and neither time has there been more than two people in front of me for immigration. Maybe on Golden Week it's a mess, but at other times, I bet you zoom through.

Who is eligible for priority security? Premium class passengers?

Not sure about JAL side. At the ANA side at Haneda, just to the right of Premium check-in counters, there is a small security entrance for premium customers to use. It is not manned so you may be able to use it without being questioned.

I think it totally depends on how much you want to spend and how much you carry.

Yes, taking the Yamanote Line from Yurakucho station to Shinagawa and then, the Keikyu line to the airport would be the fastest/cheapest option. However, Yamanote line is crowded (not crazy surdine crowded in the later evening) and you might find it uncomfy if you have to carry your bag and stuff.

One thing that I should mention is that during peak hours (which is usually 8-10a.m. and 5-7p.m.), it's not rare that someone jumps into the rail track and makes the train delay. It doesn't happen on a regular basis but it's not a surprising thingy. (It usually gets delayed once a week or more) Usually Yamanote Line and Chuo Line are popular for those suicide attempts. When it happens, especially the Yamanote Line travels ridiculously slowly.

If you depart your hotel at 5p.m., the highway to the airport could be jammed. However, it clears up by 7p.m. and it could only take 30 mins or so. If it's jammed, you can ask the driver to drive to Tokyo Rainbow Bridge then, take the highway from there as the jammed parts on the highways are usually in the central area. Every taxi has a fantastic efficient navigation system so that the driver can exactly know where is currently jammed and stuff and s/he can avoid those spots.

So in my personal opinion, if your budget allows, taxi is very convenient so that you don't have to bump into people when carrying your bag on stairways and stuff. I hope this helps. Have a wonderful trip!

FWIW, it took me about 20 minutes to get from The Peninsula Tokyo to Haneda on a Friday evening by taxi and cost me about 7000 yen.

that's a pretty hefty taxi charge...but i guess you had no choice since it was during rush hour and it's not the best time to take the train